TVE Refine Metal Co., Ltd.

Ota Kogyo Shoho, founded in 1922, primarily sold valves, cocks, and steam traps, but also sold ice cream and tires.

Ota Industry Association: Manufacture and sale of valves, cocks, and steam traps.

Ota Joutarou founded Ota Kogyo Shoho in Osaka at the age of 29.

Ota Industry Association: Ota Jōtarō founded the Ota Industry Association in Nishi-ku, Osaka City.

Reestablished as a partnership company, Goushi Kaisha Mushimono Valve Manufacturing, in Okaichō, Fukushima-ku, Osaka.

Ota Industry Association: Moved to Ōkaichō, Fukushima-ku, Osaka City, and renamed to (Co.) Mushi In Valve Manufacturing Plant. Received a special order for high-end valves from the Navy as a designated factory.

Started construction of a new factory on approximately 200 tsubo of land secured in Tsukuda-cho, Nishi-Yodogawa-ku, Osaka.

The new factory building collapsed shortly after its completion due to the Muroto typhoon that struck the Hanshin region.

Construction of the new factory began, and it was completed the following year, starting production.

Mushi In Valve Manufacturing: Commencement of construction at Tsukuda Factory

The new factory was completed and production began.

A youth school was also established within the Tsukuda factory, named "Mushi In Valve Youth School." The principal was Jōtarō. The exact opening date is unknown, but it was around 1937.

Due to the retirement of a business partner, Mushimono Valve Manufacturing had to dissolve. Joutarou restarted as a sole proprietorship using the name Mushimono Valve Manufacturing, with Tsukuda factory as the headquarters.

Mushi In Valve Manufacturing: Planning company establishment by seven founders (Ota Jōtarō, Fujimoto Retsuji, Ishimura Seikichi, Terada Soichi, Sakaguchi Kenichi, Fujii Nori, Sasakura Toshio)

Mushimono Valve Manufacturing Co., Ltd. was founded with a capital of 1 million yen, inheriting all rights and obligations from the sole proprietorship era and starting its corporate journey.

Mushi In Valve Manufacturing: Company established on April 5, 1940; application submitted to Osaka District Court on April 18, 1940, registration completed

Acquired Yamada Ironworks (located in Nori-cho, Nishi-Yodogawa-ku, Osaka City, about 80 tsubo), a long-time subcontractor, and renamed it the Nori Factory. Here, 30–40 employees were hired to produce bolts and nuts.

Also acquired the subcontractor Terada Ironworks and renamed it the Chifun Factory.

Mushi In Valve Manufacturing: Operation of Nori Factory and Chifun Factory

Mushi In Valve Manufacturing: As business expanded, factories became cramped; acquired approximately 10,000 tsubo of land in Amagasaki City’s Suidō area to build an ideal valve factory under a large-scale production plan

Tōa Valve: Acquired a new factory of about 600 tsubo in Nori-cho, Nishi-Yodogawa-ku, Osaka City

Mushi In Valve Manufacturing: Designated under Article 2, Paragraph 1, Preceding Clause of the Labor Adjustment Order by the Minister of Welfare

The Tsukuda and Tachibana factories were designated as naval management factories by order of the Minister of the Navy.

Mushimono established the first "Materials Research Institute" in the valve industry.

Renamed to Toa Valve Co., Ltd. (hereafter TOA).

Mushi In Valve Manufacturing: Capital increased to 2.5 million yen and renamed to Tōa Valve Co., Ltd.

Mushi In Valve Manufacturing: Tachibana Factory and Tsukuda Factory both received orders from the Minister of the Navy to become Navy-managed factories

Tōa Valve: Received notification of registration on the Navy procurement list

Mitsubishi Group's chief, Mr. Koyata Iwasaki, visited the Tachibana factory. After the inspection, he stated, "From a national perspective, we must cooperate with this business," and subsequently more than ten TOA executives sought technical guidance at Mitsubishi Heavy Industries Kobe Shipyard.

Tōa Valve: Prime Minister Hiranuma Eiichi inspected Tsukuda Factory

Tōa Valve: Received directive from the Minister of Commerce and Industry for a high-pressure valve manufacturing license under the Important Machinery Manufacturing Business Act

Tōa Valve: Tachibana Factory designated under Article 2, Paragraph 1, Preceding Clause of the Labor Adjustment Order by the Minister of Welfare

Tōa Valve: Opened Tokyo office in Marunouchi, Tokyo for business expansion

Tōa Valve: Tsukuda and Tachibana Factories designated under Article 1, Paragraph 3 of the Important Factory Adjustment Rules by the Minister of Commerce and Industry

Developed steel plate valves and obtained Patent No. 164811.

Tōa Valve: Tachibana Factory designated under Article 2 of the Factory Law Wartime Exception by the Minister of Welfare

Tōa Valve: Held a temporary shareholders' meeting. Approved capital increase from 2.5 million to 5 million yen, and amendments to Articles 6 and 3

In response to a request from the military, a factory was built on approximately 20,000 tsubo of land secured in Ayano, Shikoku, Kōga-gun, Shikoku, Shikoku (now Shikoku City, Shikoku). This evacuation factory mainly manufactured steel plate valves and gun metal valves.

Tōa Valve: Capital increased to 5 million yen

TOA was designated as a defense company under the Ministry of War and the Navy.

Tōa Valve: Designated as a war supplies factory

Tōa Valve: Ota Jōtarō appointed as director and production manager

Tōya Valve: Construction of a water-gate factory in Shiga Prefecture

Tōya Valve: The Tsukuda factory is designated under Article 2 of the Wartime Factory Law by the Minister of Health

The headquarters functions previously located at the Tsukuda factory were moved to the Hankyu Building in Kakuda-cho, Kita-ku, Osaka City. The general affairs and sales departments of each factory were also consolidated there.

Tōya Valve: Relocation of headquarters to 41 Kakuta-cho, Kita-ku, Osaka

Acquired the foundry in Ichikawa-cho, Minato-ku, Osaka City.

Opened a Tokyo office in the Mitsubishi Nakano 14th Building in Marunouchi, Chiyoda-ku, Tokyo.

Tōya Valve: Operation of the Ichio factory

Tōya Valve: The Ichio factory was completely destroyed by war damage

During the late night of March 13–14, a bombing raid by U.S. aircraft targeted the Osaka area for more than three hours. As a result, the newly acquired Ichikawa foundry was completely destroyed.

Tōya Valve: The Tsukuda factory was completely destroyed by war damage

On the morning of June 15, a large B‑29 formation dropped incendiary bombs on various parts of the Tsukuda factory, causing total destruction and rendering it inoperable.

Tōya Valve: The designation as a munitions company was revoked, and Ota Jōtarō was elected as representative director by the board in place of the production manager under the Munitions Company Law

In September, most employees were paid severance and dismissed, closing the factory. The remaining personnel sought a path to reconstruction.

Tōya Valve: Closure of the factory, dissolution with remaining staff

Tōya Valve: Rebuilding the company with remaining staff

Tōya Valve: Naming the acid-resistant, alkali-resistant metal "Toaeron" and the special material for concentrated sulfuric acid production "Koopron", and contributing greatly to the manufacturing of various pumps and valve nozzles, artificial fertilizers, chemical industry metal smelting plants, and artificial silk industry

As of August 10, 1946, the accounting was separated and organized into new accounts necessary for future business continuity, old accounts related to wartime compensation termination, and related losses.

A labor union was established in September 1946.

In September 1946, it moved from the nearby Hankyu Building to the Hanshin Building (now Hanshin Department Store) in Umeda 1-chōme, Kita-ku, Osaka City.

Tōya Valve: Formation of a labor union

Tōya Valve: Relocation of headquarters to the Hanshin Building (now Hanshin Department Store) in Kita-ku, Osaka

Finally delivered in September 1947.

In January of the following year, it passed the test for high-temperature, high-pressure valves used in the main valve of the Japan Power Generation Amagasaki Power Station (later Kansai Electric Power Amagasaki No. 1 Power Station).

Tōya Valve: Installation of the Lamont boiler and initial testing

Tōya Valve: Capital reduction to 3.5 million yen based on the approved corporate reconstruction plan

In 1949 (Showa 24), the Shikoku and Nori factories were closed. The machinery and equipment on site were moved to the Tachibana Factory.

Tōya Valve: Closure of the Mizukuchi and Norito factories, consolidation at Tachibana factory

Tōya Valve: Signing of a consignment sales agreement with Marunouchi Trading Co., Ltd. (Mitsubishi Trading Co., Ltd.)

Tōya Valve: Capital increase to 10.5 million yen

Delivered a high‑lift single‑stage safety valve for Kansai Electric Power Himeji No.1 Power Station.

Delivered a Benson boiler‑mounted main steam valve for Kyushu Electric Power Port No.2 Power Station.

In February 1951, the Tachibana Factory became the headquarters.

Tōya Valve: Relocation of headquarters (Hanshin Building) to Tachibana factory

Tōya Valve: The JIS designation for the spring-type safety valve for land steam boilers is approved by the Ministry of International Trade and Industry

Tōya Valve: Signing of a consignment sales agreement with Fuji Trading Co., Ltd. (Mitsubishi Trading Co., Ltd.)

Toyo Valve: Receives a 500,000 yen grant from the Ministry of Transport for research on high-temperature, high-pressure safety valves and valve seat materials.

Developed an LT‑type electric drive device in‑house and began production and sales as the "East Asia Electric Valve."

Toyo Valve: Safety valve for gas cylinders certified by the Ministry of Labor.

Toyo Valve: Capital increased to 13,125,000 yen.

Toyo Valve: Capital increased to 21,000,000 yen.

Toyo Valve: Receives 850,000 yen in applied research grant from the Ministry of International Trade and Industry.

Toyo Valve: Shares publicly listed at Osaka regional storefront.

Toyo Valve: Safety valve pending U.S. patent application receives registration assessment.

Toyo Valve: Shipboard forged cast iron ball-type and angle valve types approved for JIS marking by the Ministry of Transport.

Toyo Valve: Application for JIS marking of shipboard forged steel ball-type angle valves approved by the Minister of Transport with permit number AC-14.

Toyo Valve: Registration assessment granted for improvements to the main valve and seat of a U.S. patent-pending safety valve.

Toyo Valve: 850,000 yen grant awarded by the Minister of International Trade and Industry for the 1953 mineral and industrial technology research subsidy application.

Toyo Valve: Concludes a consignment sales agreement with Mitsubishi Corporation.

Toyo Valve: Steam trap pending U.S. patent application announced as a design application.

Toyo Valve: Safety valve pending UK Patent Office application receives registration assessment.

In October 1955, it withdrew from the All-Union Alliance and newly joined the Japan Labor Union General Council (Sōhyō) National Metal Workers Union Hyogo Regional Headquarters.

Toyo Valve: Joins the National Metal Workers Union.

Toyo Valve: Order volume surges during the six-year power generation plan, setting new company records for production and shipments.

Toyo Valve: U.S. patent safety valve assigned registration number 2754842.

Toyo Valve: Capital increased to 42,000,000 yen.

Toyo Valve: Capital increased to 50,000,000 yen.

Toyo Valve: Renewal of performance certification for gas cylinder safety valves approved.

Tōya Valve: Founder Tōtarō Ota, inventor and researcher of Japan's first high-temperature, high-pressure steam safety valve, received the Hyōgo Prefecture Science and Technology Award for lifelong achievements.

Tōya Valve: Founder Tōtarō Ota, researcher of valve seats for ships and thermal power plants and inventor of high-temperature, high-pressure safety valves, received the Purple Ribbon Medal.

TOA also supplied valves for JRR‑3.

The first proposal system at TOA was introduced in 1959 (Showa 34).

Tōya Valve: Capital increased to 100 million yen.

Developed the LTP‑type with significantly improved functionality and introduced it to the market.

Tōya Valve: Founder Tōtarō Ota received the Minister of Transport Award for maritime service.

Tōya Valve: In response to a request from Tokyo Equipment Industry Co., Ltd., which had formed a technical partnership with Fisher-Gabner Co., the valve division took over production.

Developed and manufactured a main steam shut‑off valve that met unprecedented conditions of 183 kPa and 571 °C, and secured delivery to Tohoku Electric Power Sendai Thermal Power Station.

Tōya Valve: Capital increased to 150 million yen.

Used a Monotube boiler from Sulzer Brothers as a test boiler.

Tōya Valve: Imported and installed a Sulzer-made Monochub boiler as a test boiler.

In October 1961 (Showa 36), TOA launched its first in‑house newsletter "Corporate Communications" (published monthly).

Tōya Valve: Listed on the second section of the Osaka Stock Exchange.

Constructed a large‑scale valve resistance measurement apparatus.

Tōya Valve: Part of the re-evaluation reserve fund, 13.5 million yen, was incorporated into capital.

Established the High‑Temperature High‑Pressure Valve Research Laboratory in the Structural Workshop.

After five years, in August 1964, the rules were reviewed and the system was reorganized.

In December 1964 (Showa 39), the single men's dormitory, which had been under construction on the west side of the headquarters, was completed.

When it was released in 1965, it received overwhelming support within the industry.

In 1965, the year after completion, a 'birth celebration' was held. The first one was in January of that year, attended by 69 employees born in January, the president, and other executives, who gathered for lunch at the Toa dormitory cafeteria and talked extensively. A commemorative photo was taken by everyone, and an album was given as a birthday present.

Advanced project organization to obtain certification, and applied for two models: flange‑type with welded joint and plug valve.

Manufactured a vertical wrapping‑only machine for safety valves.

In February 1967 (Showa 42), TOA established 'Toa Equipment Co., Ltd.' (capital 1 million yen) as a subsidiary handling white bronze safety valves.

Obtained API plant certification.

Developed a dedicated machine for opening‑cut processing.

In May 1968, for the experimental study of a sealed‑type prototype safety valve with a reactor emergency pressure relief device, we received a grant for peaceful nuclear energy utilization research and undertook development.

The following year, for the experimental study of its operation, we again received a grant for peaceful nuclear energy utilization research and continued development.

Jōtarō was brought into TOA as vice president in 1969 (Showa 44).

The next time the company newsletter appeared was in December 1969. This time it was a B5-sized monthly booklet spanning pages 8 to 16, titled 'Toa'.

Entered a technology partnership with Sulzer Brothers of Switzerland.

Around 1970, due to increased production at TOA, the number of work‑place accidents—including both closed and open periods—exceeded 30 per year. Since then, labor and management have cooperated to reduce and eliminate these incidents.

Produced a second‑generation unit with further enhanced performance.

In November 1970, he handed over the presidency. He himself became the chairman of the board.

In February 1971, and again in January 1981, the system was revised based on lessons learned up to that point.

Developed a valve‑body slit machine and deployed it on site.

Four and a half years after its founding, in October 1971, TOA took over operations, and Toa Equipment was dissolved.

In December 1971, a contract was signed with Dōnō for the commissioned research and manufacturing of a 550mm diameter electric valve for large sodium use.

Signed a business partnership agreement with Fisher Japan.

Just two and a half years after taking office, in May 1973, he passed the baton to his successor, Hitoshi Ota.

In August 1973, a contract was signed for research, development, and manufacturing of a butterfly valve following the aforementioned sodium valve.

Unfortunately, Takahashi passed away in June 1974, one year later.

The establishment of TEK was in mid-September 1974 (Showa 49), and approximately

In 1975, three rounds of capital increases were carried out, bringing the capital to 45 million yen, nine times the amount at establishment.

From January 1975 onward, land of about 1,280 square meters was acquired at 1-chōme, Ikawata Bepu (now Nishi-ku Minami Bepu), Saimu-ku, Kobe City, and construction progressed on three buildings: a management building (two-story steel frame with slate roof), a factory (single-story steel frame), and a warehouse (two-story steel frame).

Tōa Engineering: Capital increased to 20 million yen.

Tōa Engineering: Opened a Tokyo office at 1-28-2 Kanda-Suda-cho, Chiyoda-ku, Tokyo, Time Building 7th floor (2 men, 1 woman, sales area east of Shizuoka).

East Asia Valve: Signed a joint research agreement with Kansai Electric Power Co., Ltd. Comprehensive Technology Research Institute on "Research on the Ground Bucking of Nuclear Power Valves"

In May 1975, he died at the age of 82. A corporate funeral was held at Namba Betsuin of Tōhōgan-ji (Namikōdō), and all employees sent their farewell.

East Asia Valve: Founder Tōtarō Ota passed away (company funeral)

East Asia Engineering: Capital increased to 30 million yen

East Asia Engineering: Capital increased to 45 million yen

Completed in September of the same year as the Akashi Service Center. The total investment for this project amounted to 110 million yen.

East Asia Engineering: Opened Akashi Service Center, outsourced management operations to Akashi Kōgyō

East Asia Valve: Completed three-dimensional automated warehouse

East Asia Engineering: Second Comfort Travel (jointly with Tokyo to Hokuriku and Tōjinbō)

East Asia Valve: Introduced IBM System Computer 3/Model 8

East Asia Engineering: Obtained construction permit as a pipework contractor (Ministerial Permit (General -50) No. 6688)

In February 1976, a 690‑square‑meter plot adjacent to the center was newly purchased.

Tōa Engineering: Opening of Suumizu Dormitory in Kasumigaoka, Suumizu-ku, Kobe City (male, rental)

Tōa Engineering: Tokyo office promoted to branch

Tōa Engineering: Akashi Service Center safety valve test equipment completed

Tōa Valve: ASME N stamp survey (approved)

In October 1976 (Showa 51), the requirement for construction orders from Kansai Electric Power was revised to make the contractor responsible for radiation management tasks—previously outsourced—directly accountable to the contractor (i.e., TEK).

Tōa Engineering: Wakasawa branch office (temporary, inside Hamagishi Ryokan) opened

Tōa Engineering: Temporary office at Takahama for routine inspection work (temporary, inside Mitsubishi Takahama office) opened

Tōa Valve: Certified by ASME with "N, NPT, NV, V, UV stamps"

Tōa Engineering: Started testing safety valves for Tokai No. 2 power plant at Akashi Service Center

Tōa Engineering: Established a new management staff in the Sales Department. Took over outsourced management, material procurement, and tool management from TOA

Tōa Engineering: First order for routine inspection of the large valve and safety valve of Kansai Electric Power Co., Ltd. Takahama Plant No. 2, and started radiation management work

Tōa Engineering: Moved Wakasawa branch office to Higashi-Matsumatsu, Takahama Town, Oishi District, Fukui Prefecture

Tōa Valve: First round of rationalization proposal

Tōa Engineering: Opened Takahama and Miho work sites within Kansai Electric Power Co., Ltd. Takahama and Miho plants; stationed only during routine inspections

In October 1977 (Showa 52), Ota Hitoshi, who had been serving as president of TOA, became a part‑time director, and Tanida Sadakazu, who had been the managing director overseeing TEK’s daily management, became the new president.

Reduced TOA personnel from 570 to 365 due to a sharp decline in shipbuilding and power plant orders from 1977 to 1979

Tōa Valve: Began development of ultra-high safety valves

Board of Directors: President Hitoshi Ota became a part-time director, and Managing Director Eiichi Tanida became president

Tōa Engineering: Established a company housing system and started recruiting residents. Purchased apartments in Saimu-ku, Kobe City; Inaba-so, Amagasaki City; and Nii-machi, Akashi City

Our company was founded in 1978 (Showa 53) and has been engaged in nuclear and thermal power generation as its main business for 44 years, as well as construction and electrical equipment work for private companies and government agencies.

Tōa Engineering: Amended articles of incorporation to add radiation management work at nuclear power plants

In March 1978 (Showa 53), a new NC‑controlled model, the NC Boring Model 1 panel‑type horizontal center grinding machine, was introduced.

Acquired corporate membership of the Diamond Club.

Tōa Valve: Introduced NC Boring Unit No. 1

Tōa Valve: Second round of rationalization proposal

TOA Engineering: Takarazuka Dormitory renovation completed, move-in for interested parties begins, Suimizu Dormitory discontinued

In June 1978, TEK sold and disposed of its related equipment and withdrew from the business.

TOA Engineering: Registered as a radiation management handbook issuing authority at the Central Registration Center for Radiation Workers

TOA Valve: Development of large pressure vessel safety valve

TOA Engineering: Commencement of repair work for secondary system valves (no radioactive contamination) at Kansai Electric Power Co., Ltd. Mihama Power Plant No. 3 at Akashi Service Center

TOA Valve: Signed a contract for joint research on "Leak Prevention of Nuclear Power Plant Valves" with the Central Research Institute for Electric Power Industry

In January 1979, Mizuguchi Keizo, former senior executive of TOA and part‑time director, became chairman of TEK.

TOA Engineering: Kiyoshi Mizukami, part-time director (then TOA Managing Director), appointed as Chairman of the Board

TOA Valve: Third rationalization proposal

TOA Engineering: Sold 691 m² of land at Akashi Service Center to Akashi Kogyo

TOA Valve: Signed a contract with the Power Reactor and Nuclear Fuel Development Corporation regarding "Handling of exchanged technical information under the Japan‑Germany‑France Fast Reactor Cooperation Agreement"

TOA Engineering: Opening of Ooi Workstation

TOA Valve: Signed a contract for joint research on "Reliability Improvement of BWR Main Steam Relief Safety Valves" with Tokyo Electric Power Co., Ltd., Hitachi Ltd., and Tokyo Shibaura Electric Co., Ltd.

TOA Valve: ASME, N·NPT·NV stamp renewal

In January 1980, 'Toa' was reissued in tabloid format. Since then, it has been published three to four times a year.

In 1980, a second unit of the same model was introduced.

Implemented "FAPUTⅢ" utilizing the host computer. By simply inputting drawing instruction dimensions into the machining pattern, NC tape could be easily created, contributing to overall productivity improvement.

TOA Valve: Introduction of NC Boiling Unit No. 2

Himeji area thermal power plant scheduled inspection work (mechanical), becoming the general contractor for Kansai Electric Power Co., Ltd. Kōei

TOA Valve: ASME, V·UV stamp renewal

TOA Engineering: Officially established workstations at Kansai Electric Power Co., Ltd. Takahama, Mihama, and Ooi Power Plants

TOA Engineering: Opening of Kyushu Electric Power Co., Ltd. Genkai Power Plant workstation

TOA Engineering: Established temporary office in Mie Ward, Kyoto Prefecture, on the 4th floor of Higashiwa Industrial Building, and prepared company housing and dormitory for relocators

TOA Valve: Closure of alloy factory, furnace shutdown method

In 1981, an NC lathe Model 1 was introduced for small‑part processing, and a Model 2 was added for valve‑rod machining.

As part of employee education, a hierarchical awareness‑reform training that started as a pilot led to the manufacturing department officially launching a campaign called "Valve Full‑Open Operation".

TOA Valve: Opening of Fukushima Branch Office (treated as Tokyo office)

Tōa Engineering: Closure of Wakasa Branch Office

Tōa Valve: Introduction of NC Lathe Unit 1

Tōa Engineering: Initial inspection of the main coolant isolation valve at Kansai Electric Power Co., Ltd. Mihama Nuclear Power Plant Unit 1

Tōa Valve: First Small Group Activity Presentation Meeting

Tōa Engineering: Opening of Matsuyama Office

Tōa Engineering: Contract for valve inspection work on the nuclear vessel "Mutsu"

Tōa Valve: Introduction of NC Lathe Unit 2

Tōa Engineering: Organizational change. Separation of the construction division from the technical department, establishment of a maintenance department. Introduction of team system. Formation of a radiation management team

Tōa Valve: Fire suppression method at the old firemaking factory

Tōa Valve: 60th Anniversary Commemorative Comfort Meeting (Arima Grand Hotel)

Tōya Valve: Joint research with electric power companies on "Improving the reliability of the blowout pressure test method for pressure safety valves"

Tōya Engineering: Awarded the Hyōgo Prefecture Labor Standards Bureau Director's Effort Award

Tōya Engineering: Commenced on-site residency at Kansai Electric Power Co., Ltd. Takahama, Mihama, and Ooi, and Kyushu Electric Power Co., Ltd. Genkai

In 1983, a small Model 3 was introduced.

In 1983, a retrofit (NC conversion) was carried out.

In addition to TEK, we began joint development research of the valve alignment device (LAP ROBO) with power companies such as Kansai Electric Power and Fuji Electric.

To respond to a request from Kansai Electric Power, we tackled the theme of whether ceramic materials could be used in high-temperature, high-pressure valves as a commissioned research project.

In fiscal 1983, when the electric utility company switched from direct ordering to routing through affiliated companies, the volume of work TEK undertook decreased, unit prices were cut, and the Tokyo branch struggled financially.

Tōya Valve: Introduction of NC Boring Unit 3

Tōya Valve: Introduction of NC Radial Ball Mill

Tōya Valve: Official introduction of Automatic Band Saw Unit 2

Tōya Engineering: Establishment of "Quality Assurance Plan" related to maintenance of Kansai Electric Power Co., Ltd. nuclear power plants

Tōya Valve: Joint research with Electric Power PWRS5 Co., Ltd. on "Development of valve seat alignment device" in collaboration with Fuji Electric Co., Ltd.

In October 1983 (Showa 58), TOA entered a technical partnership with BHEL (Bharat Heavy Electrical Limited) of India.

Tōya Valve: Establishment of employee stock ownership plan (164 participants)

East Asia Valve: Opening of the Kashiwazaki Branch Office

Toya Valve: Entered a joint research agreement with Kansai Electric Power Co., Inc. Comprehensive Technology Research Institute for "Testing and Research on Applying Ceramic Materials to High-Temperature High-Pressure Drain Valves"

Toya Valve: Technical partnership with BHEL India (Bharat Heavy Electrical Limited)

Toya Valve: Signed a contract with BHEL India for "Technology Transfer on High-Temperature High-Pressure Valves"

Toya Valve: Conducted joint research on "Development of Valve Maintenance System" with Kansai Electric Power Co., Inc.

We entered into corporate pension (qualified retirement pension) insurance contracts with a trust bank and a life insurance company.

Toya Valve: Introduced Fujitsu FACOM M340S

Toya Valve: Conducted joint research with Hitachi Ltd. on "Survey and Research on Element Technologies for Nuclear Power Robots" with Kansai Electric Power Co., Inc.

The company Takada Steel Co., Ltd. (hereinafter referred to as TAK) in Takada, Yamagata Prefecture, notified TOA that it was planning to shut down.

President Hitoshi Ota fell ill and had to take a break in mid‑January. A few days later, he suffered a severe headache, was examined at a hospital, and was diagnosed with subarachnoid hemorrhage.

To avoid a halt in business activities, during his hospitalization, the board of directors decided that Executive Director Kazuyuki Kiso would assume the role of representative director.

We conveyed our intention to provide as much support as possible for business continuity and held extensive consultations with the company, its parent company Kokoku Steel, and other related parties. As a result, in financial terms, the capital of TAK, which was 100 million yen, was reduced to 10 million yen, TOA was set to hold 45% of the shares, and personnel would be dispatched from TOA for management reconstruction.

In fiscal 1985 (Showa 60), TEK's sales rose 24.7% from the previous year to 2.32 billion yen, surpassing 2 billion yen for the first time. Nuclear-related sales accounted for about 1.6 billion yen, roughly 70% of total sales.

He remained in a critical condition while unconscious and passed away in late February at the age of 59.

At that time, TOA president Hitoshi Ota passed away suddenly, and the successor was Shinobu Kawakubo from Mitsubishi Corporation.

Toya Valve: President Hitoshi Ota passed away (59 years old)

In the following month, a corporate funeral was held at the Chisari Hall in Suita City.

Toya Valve: Funeral of former President Hitoshi Ota

Toya Engineering: Established Maintenance Department Team 4 (Kyuuden Division)

In October of the same year, I became TOA's permanent advisor.

After the shareholders' meeting in December, I assumed the position of the fourth president.

The "East Asia Valve Alumni Association" was founded as a gathering of former TOA employees, and the first general meeting was held in December of that year.

Toya Valve: Shinobu Kawakubo appointed as president

Toya Valve: Formation of TOYA Valve OB Association

Toya Valve: Participated in joint research with PWRS5 Co., Ltd. "Study on the Effect of Loop Seals in Pressure Relief Valves" with Mitsubishi Heavy Industries Ltd.

In 1986, a retrofit (NC conversion) was carried out.

Kokoku Steel filed for corporate reorganization and ultimately went bankrupt.

The "Aged Employment Stabilization Act" was enacted.

Toya Valve: Renewed and extended a 10-year contract with Swiss company Sulzer Brothers for "Technical partnership on automatic adjustment valves for thermal and nuclear power plants"

Toya Valve: Conducted joint research with Fuji Electric Co., Ltd. on "Valve Seat Alignment Device and Confirmation Test" with Kansai Electric Power Co., Inc.

Toya Valve: Signed a joint research agreement with the Central Research Institute of Electric Power with "Development of Internal Valve Leakage Monitoring Device by Acoustic Law"

For the first "suburban networking event," colleagues gathered at the Minoo Tourist Hotel, enjoyed a meal, and rekindled old friendships.

First, we implemented full air conditioning of the cafeteria.

Toya Valve: Installed air-conditioning equipment in the cafeteria

In 1987, a panel‑type center grinding machine with a spindle was introduced as Model 4.

In 1987, a high‑performance small NC lathe Model 3 was added.

We started a joint research project to enhance the inspection of electric valves in routine maintenance work at nuclear power plants, in which TEK participated alongside Kansai Electric Power, Kanden Kogyo, and Sumitomo Corporation.

A project began to build a new factory on approximately 9,200 tsubo of land acquired in Kawanishi, Iga Town, Ashigaru District, Mie Prefecture (now Kawanishi, Iga City, Mie Prefecture) and relocate there.

President Kawakubo, who took office at the end of 1985, was determined, and TQC activities began at the start of 1987.

In fiscal 1987, the first inspection of a newly built plant was limited to a single case at Kansai Electric Power's Akahoshi Power Station Unit 1, and sales fell to 2.19 billion yen, a 15.0% decline from the previous year.

Since around 1987 (Showa 62), each group company has held technology conferences, setting themes such as new product development, productivity improvement, and maintaining and enhancing quality.

The "East Asia Valve 65th Anniversary Celebration Party" hosted by TOA invited alumni.

TEK and TOA, together with Mitsubishi Heavy Industries, worked on developing the main steam safety valve blow-off pressure automatic inspection device (MS-SPEED) in collaboration with five PWR operators (Kansai Electric Power, Hokkaido Electric Power, Shikoku Electric Power, Kyushu Electric Power, and Japan Atomic Power) and Mitsubishi Heavy Industries.

We developed cutting and welding machines that enable on-site replacement.

At the suburban networking event, we visited Yugō Onsen in Okayama Prefecture and toured the newly completed Seto Ohashi Bridge.

In July 1988, the repayment of the 100 million yen principal loan received from two banks at the time of establishment was completed, bringing long‑term debt to zero.

TEK and TOA completed the development of the main steam safety valve blow-off pressure automatic inspection device (MS-SPEED) that they had been working on with five PWR operators (Kansai Electric Power, Hokkaido Electric Power, Shikoku Electric Power, Kyushu Electric Power, and Japan Atomic Power) and Mitsubishi Heavy Industries.

We constructed the 5th unit of the Himeji Second Power Station of Kansai Electric Power using this new construction method, and it was also adopted by Tokyo Electric Power and Tohoku Electric Power.

In fiscal 1989, sales recovered to 3.02 billion yen, surpassing the next milestone.

In January 1989 (Heisei 1), TEK held a 15th‑anniversary celebration party at Portpia Hotel in Chuo-ku, Kobe, celebrating the company’s steady growth with all employees.

In May of the same year, a two‑group, three‑night commemorative trip to Okinawa was also conducted.

A state-of-the-art casting steel plant covering about 2,000 tsubo was completed and a hot‑rolling ceremony was held. This marked the full relocation.

"T.S.K. Co., Ltd." was established with 100% investment from TOA.

In August, together with executives from partner companies, they visited Minatogawa Shrine to pray for accident‑free construction and later held a social gathering.

Delivered the first model of the check valve to the Mihama Power Station of Kansai Electric Power.

The successfully commercialized MS-SPEED was sequentially introduced to the nuclear sites of Kansai Electric Power.

In November 1989 (Heisei 1), the company opened the Keiyo Service Center as its own base in Ichihara City, Chiba Prefecture.

In fiscal years 1990 and 1991, we achieved consecutive years of strong performance with sales exceeding 1.8 billion yen and operating profit just under 200 million yen.

With the amendment of the "Aged Employment Stabilization Act," reemployment up to age 65 became a mandatory effort for those who wished.

In February 1990, the sales functions in the Chukyo area, which served as the base for the central electric power market, were transferred from headquarters to the Tokyo branch.

In December of the following year, the Tsurumi warehouse functions were also integrated, and the Keiyo Sales Office was established within the Keiyo Service Center.

We contracted eight inns in the Nanao, Kumihama, and Takeo areas of San'in as TOA-designated welfare facilities, allowing employees and their families to use them at low cost.

Regarding the production site, starting with the first machine factory (large valve factory) in 1991, we completed air conditioning of all facilities within three years through the second phase of construction (assembly plant, pressure and steam test plant) and the remaining sites in the third phase.

Yoshio Sezaki was newly appointed as TOA president.

I relaxed at Nishiura Onsen in Aichi Prefecture, and visited historical sites such as the Battle of Okehazama and Okazaki Castle.

In fiscal year 1994 (Heisei 6) (August 1994 to July 1995, period 22), despite a business halt due to the Hanshin-Awaji Great Earthquake, sales reached 4.3 billion yen and ordinary profit was 598 million yen. This led to a special interim period (period 27, August 1 1999 to September 30 1999, sales 870 million yen) to change the fiscal year, and over six years (periods 22–28) until the end of fiscal 1999, sales exceeded 4 billion yen and ordinary profit exceeded 500 million yen, sustaining strong performance.

In September 1994 (Heisei 6), the management personnel of TEK were refreshed. Tada Sadahiro stepped down as president and became a consulting director, while Toda Masahiro became president. Additionally, Sakaki Yukio, a part‑time director, became the new chairman.

In January 1995, TEK published its first internal newsletter, "TEK News" (quarterly).

On January 17 of the same year, shortly after the inaugural issue was released, the Hanshin‑Awaji earthquake occurred.

In February of that year, the Keihama Parts Center was established in Kawasaki City.

Within TEK, a sense of crisis prompted the establishment of a project team in March 1995 at the executive department meeting, where all employees involved in current operations examined concrete measures to expand construction volume and improve operational efficiency.

In August of the same year, a "Workplace Operations Reform Project Report" was compiled.

In November of the same year, it moved to the 23rd floor of Mita International Building in Minato-ku, Tokyo.

In 1996, a Central Service Center was established in Kawagoe Town, Mie County, Mie Prefecture, near the Kawagoe Thermal Power Plant of Chubu Electric Power, creating a system that could respond closely to customers.

From April 1996, to deepen cooperation between TOA and TEK, mid-level executives began personnel exchanges, each spending a year and experiencing each other's on-site operations. The joint quality conference also helped deepen mutual understanding of each company's businesses, products, and services.

In May 1996, the "Wakasa Project" was launched in the Wakasa region, which has three offices, expanding employees' responsibilities and promoting the development of construction projects at the workplaces. Starting with Project 4, a 47‑day shortened inspection system was established.

I enjoyed the Mino and Hida-Takayama region.

Considering consolidation with TOA, we closed the fiscal year at the end of September 1996 and thereafter defined the fiscal year from October to the following September.

In 1997 (Heisei 9), it changed to A4 size.

From Issue 9 (January 1997), the name "TEK News" remained unchanged, but the nickname "Chikafuu"—recruited internally—was drawn as the title at the beginning of each issue.

In January 1997 (Heisei 9), a "Valve Training Facility" was established within the equipment factory of the Akashi Service Center.

From January 1998, Kansai Electric Power set a target of a 40‑day inspection period. While the first shortened inspection project, Project 3 at Miho, took 41 days, Project 3 at Oi achieved a record 38 days, the shortest domestic nuclear inspection at the time.

In December 1998, land (578 m²) at 4‑chome, Isojō-dori, Chuo-ku, Kobe City, and a 4‑story reinforced concrete office building (floor area 1,894 m²) were acquired.

Renamed to TOU A Service Co., Ltd.

In June 1999, the 25th anniversary of the company, TEK moved from the familiar Fujimoto Kobe Building next to Hanakuma Station to this new headquarters.

In 2000 (Heisei 12), the facilities and land were all sold.

With the introduction at the Ooi Power Station, MS-SPEED was installed at all sites.

Since the birth of TVG in March 2000 (Heisei 12), all members of the group have united beyond corporate boundaries and worked on organizational and business reforms.

Establishment.

From around April 2001 (Heisei 13), teams were reorganized, personnel were dispatched to each other's inspections for learning, and preparations for integration were made. TEK’s maintenance department was split into Maintenance Department 1, and TOA’s maintenance unit of over 60 personnel was transferred to TEK as Maintenance Department 2.

In April of the same year, 435 tsubo of land in Inaba Motomachi, Amagasaki City, was leased, and TSK, as the business entity, launched a self‑service automotive wash facility.

In July 2001 (Heisei 13), the Phoenix Operation began.

In September 2001, a partnership was formed with ARCA (Arca Regler) of Germany, a globally recognized valve manufacturer, entering the domestic sales and maintenance business for their control valves.

The company first created and published a website in April 2002.

The inspection work for Unit 2 of the Tsuruga Nuclear Power Plant, which began in June 2002, was completed in 25.5 days, the shortest in domestic history, and the plant director awarded a commendation.

In October 2002, the Singapore corporation "TOA Valve Overseas" (English name "TOA VALVE OVERSEAS Pte. Ltd." (formerly TVO, now TGA)) was established with a capital of 100,000 Singapore dollars.

Operations began in January of the following year. In January 2003, the first project in the TUAS development area in western Singapore was awarded to TVO.

Hokkaido Electric Power began construction of Unit 3 of the Tōbō Power Plant. In connection with this, TOA received a request from Mitsubishi Heavy Industries, a plant manufacturer, to produce a pressure relief valve.

In March of that year, a grand opening ceremony (TVO Opening Ceremony) was held, inviting the plant director, the project manager of the shipyard, representatives from the shipping management company and the embassy.

In April 2003, TEK also started the container room service using the idle land of the former Akashi Service Center.

In October of that year, a customer in Malaysia requested a local company to repair a valve, but the leak could not be contained, so TVO received a repair request. The staff flew to Malaysia immediately, collected the item, and completed the repair after three days of sleepless work.

Later, in January 2004, the company newsletter 'Ibuki' was published by the TVG headquarters, taking on the role of a communication medium.

In 2004, this was elevated to a group-wide event, and the first TVG Technical Conference was held. Since then, it has been held twice a year in spring and autumn, and participants listen attentively.

In October 2004, with the aim of improving operational efficiency and reducing interest burden, a Cash Management System (CMS) was launched to consolidate and centralize the funding and management functions of group companies within TVG.

Since December 2004, it began arranging materials such as cast steel and forging.

Obtained the SAC-SINGLAS (Singapore Accreditation Board, equivalent to Japan's JAB – Japan Accreditation Board for Conformity Assessment).

In May 2005, TOA received a "China Safety Valve Manufacturing Permit."

The following year, in July, machine processing began.

In August of the same year, under the umbrella of Harpin Electric Group, one of China’s three major electrical groups, Harpin Boiler secured an order for needle valves for the Yuankuan Supercritical Power Plant.

TAK joined TOA.

Vendor registration at Senbawan Shipyard and Keppel Shipyard, two leading shipyards in Singapore, led to increased orders.

Fiscal year 2006 (Oct 2006 – Sep 2007, period 8) recorded the highest sales of 11.64 billion yen and ordinary profit of 1.34 billion yen since establishment.

In April 2006, TOA issued 900 million yen of MSCB (new type convertible bond with reservation rights), enabling flexible capital management, and allocated about 400 million yen for equipment investment to strengthen the valve manufacturing business, including at Takada Steel Works (later Iga Plant).

In May 2006, ten months later, the company underwent dimensional and appearance inspections by government authorities.

All of TAK's businesses were split into a company through a split-off, and the assets were transferred to TOA.

In November, it also underwent operational and leak inspections by government authorities.

Following the succession of Atsushi Sasaki, Masato Asao became the new president of TVG, TOA, and TEK.

Business expansion became global, receiving contract work from shipping companies in Dubai and thermal power plants in Taiwan.

In addition to equipment investment in production and development, such as renovating shaker equipment, installing a cart-type electric furnace, updating large dust collectors and spectrometers, efforts were also made to improve the workplace environment, including renovating the welfare building and building a new break room.

In 2007, the company had the opportunity to participate in a space development project. Kawasaki Heavy Industries Akashi Plant requested cooperation in developing and manufacturing a super‑high‑temperature, high‑pressure pressure‑adjusting valve (water‑cooled butterfly valve) for a combustion test apparatus for a JAXA jet engine.

Building on that, fiscal year 2007 (Oct 2007 – Sep 2008) secured orders for seven projects and sixteen units.

After divesting its business and personnel, the remaining Takata Steelworks was dissolved at the end of February 2007.

It was shipped in March 2007.

TEK and TOA merged.

With the merger of TOA and TEK, it became the Steel Production Division.

All delivery works were completed in January of the following year.

In October 2008, TOA and TEK merged to form "East Asia Valve Engineering Co., Ltd." (abbreviated TVE).

Exited the sintered parts business inherited from the former Takata Powder Metallurgy.

Sales rose to 12.42 billion yen the next year, surpassing that figure, and in 2009 fiscal year, ordinary profit reached 1.6 billion yen.

In 2009 (Heisei 21), the sintering business was discontinued.

In July 2009, two and a half years after taking office, Asao appeared on BS Asahi's "Sage's Choice."

In December 2009, Unit 3 of the Tomo Power Plant began commercial operation.

In April 2010, TVG and TVE underwent a parent‑child merger (TVG, a listed company, remained the surviving entity) and changed its name to the newly formed "East Asia Valve Engineering Co., Ltd." This completed a decade of group restructuring.

In July 2010, responding to repeated offers from the other party, the company entered a technology partnership agreement with HVC (HE Harpin Power Plant Valve Co., Ltd.) of the same group, covering exhaust check valves and a newly designed H‑shaped valve.

Renamed the site "Iga Factory."

During the Great East Japan Earthquake, employees of the company and its partners worked at many sites. Although there were material damages such as vehicles being swept away by the tsunami, no one was killed or injured. At the general assembly, it was explained that the company donated 10 million yen as a relief fund.

Asao stepped down, and Yuichi Karazawa became the new president.

The "Seven Arrows" strategy, emphasizing strengthening new businesses, has been approved.

In 2013, a new agreement was signed to include a wet‑bypass valve for secondary systems in nuclear power plants as a technology partnership target.

Received the first partnership offer.

Produced and published the "30th Anniversary Commemorative Book."

Established the independent company "Toa Create Co., Ltd.".

Obtained the "Special Personnel Dispatch Business Permit" required for business activities.

Obtained the "Construction Permit (Civil Engineering, Machinery Installation)".

Yoshihisa Manabe was appointed as the new president.

In 2016 (Heisei 28), Kitts became a new partner through a partnership. Kitts is far larger than our company in terms of sales and organizational scale, and possesses various insights in technology and management that we do not have.

Announced externally that a capital and business partnership agreement would be signed with Kitts. As part of this partnership, Kitts acquired all TVE shares held by Mitsubishi Corporation (11.28% of issued shares, 12.98% of voting rights) and became the company's largest shareholder.

Formulated and announced the first medium-term management plan "2021 100th Night TVE Re-growth Plan" covering the five-year period of the 18th to 22nd terms (2016/10–2021/9).

At the 2016 (Heisei 28) December general meeting of shareholders, the approval of the amendment to the articles of incorporation transitioned the company from a company with a board of auditors to a company with an audit committee.

The company was established in 2017 as a 100% subsidiary of Aisin Fukui Co., Ltd., and it produces torque converters and transmissions, the heart of automatic transmissions for automotive parts.

Under the supervision of JAXA staff, the final on‑site operational test was passed and the product was delivered.

After the first target period started, in November 2017, one year later, we formulated and announced an updated plan based on the performance of the completed period.

In December 2017 (Heisei 29), after the 18th ordinary shareholders' meeting and subsequent board meeting, President Manabe became chairman, and former vice president Yoshimichi Sasano became president.

At the end of 2018 (Heisei 30), we launched the project "TAMES-Factory" under the name of TVE.

In December 2018, two years later, we formulated and announced an updated plan based on the performance of the completed period.

From 2019, we operated under a new name.

We started activities in January 2019.

In April 2019 (Heisei 31), the TVE corporate website was radically renewed to better showcase the company's technical capabilities.

In June 2019, we continued the medium-term management plan "2019–Beyond the 100th Anniversary: Realizing the Vision for the Future" covering the 21st to 25th terms (2019/10–2024/9).

As part of the 100th-anniversary commemorative project, established an executive committee with 12 members, chaired by President Sasano.

In October 2019 (Reiwa 1), our company launched a new business and established TVE Refine Metal Co., Ltd. (hereafter TRM) in Honjo, Ooi Town, Oihe District, Fukui Prefecture. With a capital of 49 million yen (1,960 shares), the group company Toua Service holds only one share (0.05%), and the remaining capital is contributed by TVE.

Toya Valve Engineering: Established TVE Refinemetals Co., Ltd. as a subsidiary to fully enter the decommissioning business

Aiming for full participation in decommissioning-related business, established TVE Refine Metal Co., Ltd. as a subsidiary.

Since 2020, we have also started producing molds using expanded polystyrene.

At the first meeting, the executive committee officially decided to compile the 100-year history, and the compilation committee was selected from the executive committee members.

In July 2020 (Reiwa 2), we released a technical video library at the aforementioned Valve Solution and Casting Steel Technology Lab. Our engineers demonstrated the testing equipment and explained what tests can be performed. We also prepared many videos that allow virtual tours of the casting steel manufacturing process, which is normally difficult to see. Additionally, we launched an "online technical consultation" using the web, further advancing digital marketing.

The name of this Singapore subsidiary was changed to "TVE GLOBAL ASIA PACIFIC Pte. Ltd." (abbreviated TGA), clarifying its position among all Asian regional sites.

TVE GLOBAL ASIA PACIFIC: Renamed its Singapore subsidiary TOA VALVE OVERSEAS Pte. Ltd. to TVE GLOBAL ASIA PACIFIC Pte. Ltd.

After changing its name to Toa Valve and Toa Valve Engineering, it was renamed to the current TVE.

In October 2020, in response to the Ministry of Economy, Trade and Industry’s "Reiwa 2 Nuclear Industry Infrastructure Strengthening Project Subsidy" solicitation, TRM proposed the "Development Project for Melting Equipment for Dismantling Metal Materials at Nuclear Power Plant Decommissioning." It was selected along with companies such as Mitsubishi Heavy Industries and Hitachi GE Nuclear Energy, becoming an indirect subsidy recipient.

In October 2020 (Reiwa 2), our company renamed from the former name "Tōa Valve Engineering Co., Ltd." to "TVE Co., Ltd." (English: TVE Co., Ltd.) using the abbreviation "TVE" that had been used as a short form. We also decided to renew our brand logo.

Toya Valve Engineering: Renamed to TVE

TVE: With the name change, adopted "Challenge for the NEXT (TVE’s challenge moves to the next stage)" as its corporate message

Regular general meetings (36th) and social gatherings continued, fostering ongoing interaction among colleagues who shared the same goals during their active years.

TAMES-DX promoted the challenges set by selected members in April 2021 (Reiwa 3).

As of May 2021 (Reiwa 3), four TAMES Projects are underway.

On July 15 of the same year, we held a company-wide announcement and began pioneering company-wide DX activities.

In October of that year, to further strengthen activities, we elevated the project to a higher level based on six pillars, set a basic philosophy, and are promoting digital reform in each department.

At the board meeting held on November 29, 2021 (Reiwa 3), it was decided to acquire shares of Taiyo Denryō Co., Ltd. (hereafter TDC) and make it a subsidiary.

TVE: Exceeding 100 years of founding, moving toward realizing the "future vision", announced the revised version of the Medium-Term Management Plan 2019 (FY21: September 2020 to FY25: September 2024) in November 2021.

After acquiring TDC shares, TDC became a new member of the TVE Group in January 2022.

TVE: Acquired Solar Power Co., Ltd. as a subsidiary.

President Sasano performed the ceremonial first strike at the Iga Plant Special High-Voltage Receiving Station groundbreaking ceremony (February 2022).

TVE: Performed a ground-breaking ceremony for the update of the special high-voltage receiving equipment and related construction at the Iga plant.

Celebrated its 100th anniversary.

TVE: 100th anniversary of founding.

In April 2022, our company secured its first hydrogen project order.

Completion of the Iga Plant Special High-Voltage Receiving Station (August 2022).

President Sasano pressed the start switch at the completion ceremony of the Iga Plant Special High-Voltage Receiving Station (August 2022).

TVE 100-Year History: Connecting Dreams, Hearts, and Technology – Publication.