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§05
Network
NETWORK
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§06
History
103 EVENTS
In January 1947 (Showa 22), established Takita no Kumi Co., Ltd. in Osaka City with construction as the main business purpose.
Established Takiya No Kumi Co., Ltd. in Osaka City with construction as the main business purpose.
January : Takitanogumi Co., Ltd. was established in Osaka City with construction as its main business objective.
Founded: January 28, 1947 (Showa 22).
Founding
In September 1949 (Showa 24), registered as a construction contractor under the Construction Business Act.
Registered as a contractor under the Construction Business Act.
september : Registered as a construction company under the Construction Business Act
In November 1956 (Showa 31), changed the company name to Fudo Kensetsu Co., Ltd.
Name changed to Fudo Construction Co., Ltd.
november : Company name changed to Fudo Construction Co., Ltd.
In December 1958 (Showa 33), opened the Tokyo headquarters.
Opened Tokyo headquarters
december : Tokyo head office opened
In May 1961 (Showa 36), established Tetra Pod in Chuo-ku, Tokyo for manufacturing, selling, designing, and constructing the same.
Established Tetra Co., Ltd. (Chuo-ku, Tokyo)
May : Founded in Chuo-ku, Tokyo, with the business objectives of manufacturing and selling tetrapods, as well as the design and construction of such structures.
In June 1961 (Showa 36), registered as a construction contractor under the Construction Business Act.
June : Registered as a construction company under the Construction Business Act
In August 1961 (Showa 36), listed shares on the Osaka Stock Exchange Open Market.
Listed shares on Osaka Main Market
August : Stock listed on the Osaka over-the-counter market
In October 1961 (Showa 36), listed shares on the Osaka Securities Exchange Second Section.
Listed shares on Osaka Securities Exchange Second Section
10月 : Stock listed on the Second Section of the Osaka Securities Exchange
In May 1962 (Showa 37), listed shares on the Tokyo Securities Exchange Second Section.
Listed shares on Tokyo Stock Exchange Second Section
May : Stock listed on the Second Section of the Tokyo Stock Exchange
In December 1962 (Showa 37), opened the Nagoya branch (now Chubu branch).
Opened Nagoya branch (now Chubu branch)
december : Nagoya Branch (now Chubu Branch) opened
In July 1964 (Showa 39), opened the Kyushu branch.
Opened Kyushu branch
July : Kyushu branch opened
In March 1966 (Showa 41), moved headquarters to Minato-ku, Tokyo.
Moved headquarters to Minato-ku, Tokyo
March : Head office moved to Minato-ku, Tokyo
In February 1967 (Showa 42), shares were designated to the First Section at each exchange.
February : The stock is transferred to the first section of each exchange.
1969
In May 1969 (Showa 44), the Tsukuba Technology Center (now the Comprehensive Technology Research Institute) was established in Tsukuba City, Ibaraki Prefecture.
Opened Tsuchiura Technology Center (now Comprehensive Technology Research Institute) in Tsuchiura City, Ibaraki Prefecture
In October 1970 (Showa 45), opened the Osaka headquarters.
October : Osaka main store opened
In June 1971 (Showa 46), established Fudo Kenken Co., Ltd. (now Kenken Co., Ltd.).
June : Fudo Kenken Co., Ltd. (now Kenken Co., Ltd.) is established
The Tsuchiura Technical Center (now The Technical Research Institute) was established in Tsuchiura City, Ibaraki Prefecture.
In July 1972 (Showa 47), the company headquartered in Koto-ku, Tokyo, Tokyo Metropolitan Printing and Binding Co., Ltd., was merged as the surviving company, and the name was changed to Japan Tetrapod Co., Ltd.
Merged with Tokyo Metropolitan Koto-ku-based Capital Printing & Binding Co., Ltd. as the surviving company and changed the corporate name to Japan Tetra Pod Co., Ltd. for share nominal value adjustment
Merged with Shutoken Printing and Binding Co., Ltd., located in Koto-ku, Tokyo, as the surviving company in order to change the par value of the stock, and changed the company name to Japan Tetrapod Co., Ltd.
In November 1972 (Showa 47), the company was listed on the Second Section of the Tokyo Stock Exchange.
Listed shares on Tokyo Stock Exchange Second Section
Stock listed on the Second Section of the Tokyo Stock Exchange.
In July 1976 (Showa 51), established Fudo Jukichi Co., Ltd. (now Soil Technica Co., Ltd.).
July : Fudo Heavy Machinery Co., Ltd. (now Soil Technica Co., Ltd.) is established.
In July 1981 (Showa 56), the headquarters moved to Shinjuku-ku, Tokyo.
Moved headquarters to Shinjuku-ku, Tokyo
Head office moved to Shinjuku-ku, Tokyo.
In December 1988 (Showa 63), changed fiscal year end from September 30 to March 31.
december : Changed fiscal year end from September 30th to March 31st
In April 1993 (Heisei 5), Tetra Trading Co., Ltd. (now Welfare Trading Co., Ltd.) was established.
Established Tetra Trading Co., Ltd. (now Welfare Trading Co., Ltd.)
In September 1993 (Heisei 5), the company was reclassified to the First Section of the Tokyo Stock Exchange.
Shares were reclassified to the First Section of the Tokyo Stock Exchange
Stocks listed on the First Section of the Tokyo Stock Exchange.
In October 1995 (Heisei 7), the name was changed to Tetra Corporation.
Changed corporate name to Tetra Co., Ltd.
Company name changed to Tetra Co., Ltd.
In October 1999 (Heisei 11), Akiwa Construction Co., Ltd. (now Takahashi Akiwa Construction Co., Ltd.) was established.
Established Akiwa Construction Co., Ltd. (now Takahashi Akiwa Construction Co., Ltd.)
Akiwa Construction Co., Ltd. (now SHUWA CONSTRUCTION Co., Ltd.) was established.
In July 2003 (Heisei 15), the headquarters moved to Minato-ku, Tokyo.
Moved headquarters to Minato-ku, Tokyo
Head office moved to Minato-ku, Tokyo.
In March 2004 (Heisei 16), transferred the construction business to Nakano Fudo Construction Co., Ltd.
In March 2004 (Heisei 16), transferred all shares of Fudo Kenken Co., Ltd. (now Kenken Co., Ltd.) to Phoenix Capital Co., Ltd., and Tetra Co., Ltd. became a subsidiary through a third‑party allotment.
In March 2004 (Heisei 16), the third‑party allotment of capital stock of Fudo Construction Co., Ltd. was subscribed, making it a subsidiary.
Acquired a third‑party allotment of shares in Fudo Construction Co., Ltd. as a subsidiary
Transferred the construction business to Nakano Fudo Construction Co., Ltd.; transferred all shares of Fudo Kenken Co., Ltd. (now Kenken Co., Ltd.) to Phoenix Capital Co., Ltd.; Tetra Co., Ltd. became a subsidiary by acquiring a third‑party allotment of shares
March : Transferred construction business to Nakano Fudo Construction Co., Ltd. Transferred all shares of Fudo Kenken Co., Ltd. (now Kenken Co., Ltd.) to Phoenix Capital Co., Ltd. Tetra Co., Ltd. became a subsidiary through a third-party allocation of new shares.
Underwrites a third-party allocation of new shares from Fudo Construction Co., Ltd. and makes it a subsidiary.
In January 2005 (Heisei 17), all shares of Sanbatsu Co., Ltd. were acquired, making it a subsidiary.
We will acquire all shares of Tripole Co., Ltd., Ltd. and make it a subsidiary.
In February 2005 (Heisei 17), established Fudo Construction Inc. in California, USA.
Established Fudo Construction Inc. in California, USA
February : Established Fudo Construction Inc. in California, USA
In September 2006 (Heisei 18), all shares of Tohwa Civil Engineering Co., Ltd. were acquired, making it a subsidiary.
Acquired all shares of Toa Doboku Co., Ltd. and made it a subsidiary.
Change of company name to Fudo Tetra Co., Ltd.
October : Tetra Co., Ltd. and Fudo Construction Co., Ltd. merged, with Fudo Construction Co., Ltd. as the surviving company, and changed the trade name to Fudo Tetra.
In July 2011 (Heisei 23), the headquarters moved to Chuo-ku, Tokyo.
Relocation of headquarters from Osaka City to Chuo-ku, Tokyo
July : Head office moved from Osaka to Chuo-ku, Tokyo
In August 2011 (Heisei 23), the listing of shares on the Osaka Stock Exchange was discontinued.
Delisting of shares from the Osaka Stock Exchange
August : The company's stock is delisted from the Osaka Securities Exchange.
In April 2018 (Heisei 30), the subsidiary Tohwa Civil Engineering Co., Ltd. was absorbed and merged.
Absorption merger of subsidiary Tohatsu Civil Engineering Co., Ltd.
April : Merged with subsidiary Toa Doboku Co., Ltd.
In October 2020 (Reiwa 2), all shares of the Aichi Base Industrial Group were acquired, making it a subsidiary.
Acquisition of all shares of Aichi Base Industrial Group and making it a subsidiary
October : Acquired all shares of Aichi Base Kogyo Group and made it a subsidiary
§07
News
21 ARTICLES
Hosted 'Kid Work' at the Comprehensive Technology Research Institute
Fudō Tetra held the job experience program 'Protecting Our Lives with TetraPods' at the Comprehensive Technology Research Institute in Tsuchiura City, Ibaraki Prefecture, on August 1, 2026. Elementary school students and parents participated, experiencing the installation of wave-damping blocks in a flat aquarium and comparative experiments, among other activities. Participation in this program has continued since 2021, making this the sixth year.
Viewing Application for the Memorial Symposium Video of Dr. Kenji Ishihara
The lecture video of the "Memorial Symposium for Dr. Kenji Ishihara" held on August 20, 2026, has begun streaming on YouTube. Viewers wishing to watch must fill out the application form with the required information. After completion, a viewing URL will be automatically sent to the registered email address. Viewing requires agreement to copyright protection and terms of use.
Display corporate advertisement at Naga-horibashi Station
Since October 12, 2026, we have displayed a corporate advertisement for Fudo Tetra on the station sign in the concourse outside the north ticket gate of Osaka Metro Naga-horibashi Station. We have advised station staff to refrain from inquiries.
Public Disclosure of Basic Policy on Customer Harassment and Recruitment Activities
Fudo Tetra Co., Ltd. has formulated and published a basic policy on customer harassment and rules for recruitment activities. The policy stipulates protecting employees' safety and dignity against unreasonable demands or conduct that are socially unacceptable, and aims to maintain healthy customer relationships. The recruitment activity rules clarify the time, place, and communication methods during interviews and selection, and demonstrate a policy to create an environment where job seekers can participate with peace of mind.
Risoil SAVE Composer Registered with NETIS
The Risoil SAVE Composer (QS-260008-A) has been registered with NETIS. The static compaction sand pile method, which reuses construction-generated sandy soil as backfill material for sand piles, is expected to reduce the use of natural sand and the amount of construction-generated soil that needs to be transported and disposed of, thereby reducing environmental impact and costs. The former name was Risoil Pro method.
Fudo Tetra Publishes FY2026 Corporate Report
Fudo Tetra has published its FY2026 corporate report, including a feature commemorating the 20th anniversary of its merger. The report introduces the company's history, employee perspectives, and diverse work styles.
Underwater Positioning System 'AquaMarionette' Demonstration Test Conducted
Fudō Tetra Co., Ltd. conducted a demonstration test of the high-precision underwater positioning system 'AquaMarionette' for installing structures on the seabed, in collaboration with Kumagai Group and Takahashi Akiwako Construction. At a seabed depth of 1,800 meters offshore, they confirmed a positional measurement accuracy of less than 20 cm and verified the effectiveness of high-speed, high-precision installation guidance using digital twin technology.
A report provides the status of shield tunneling work on the Donkawa Trunk Sewer Project for September 2026. Reports on earlier progress are also available in the archive.
Symposium Held in Memory of Professor Kenji Ishihara
A symposium honoring Professor Kenji Ishihara was held on August 20, 2026, at the Nihonbashi Social Education Hall. Geotechnical engineering experts gave presentations, and approximately 200 people attended.
Nomigawa Amplification Main Line Construction Shield Progress Report (August 2022 Edition)
The progress status of the Nomigawa amplification main line construction shield in August 2026 was reported. Past progress information is also published as back issues.
§08
Public records
GOV
National Tax Agency basic information4010001141053
Source: National Tax Agency Corporate Number Publication Site, basic three items
