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| GTOSS |
Founded Kochi Tech Research Consultant and started civil engineering projects. Began research on pollution-free industrial machinery and construction methods.
Founded on January 1, 1967 (Showa 42).
Founded Kochi Giken Consultant and commenced civil engineering operations. Began research on non-polluting industrial machinery and construction methods.
Founded
Incorporated Kochi Tech Research Consultant as a corporation.
Kochi Giken Consultant was incorporated as a corporation.
The world's first pollution-free pile driving and pulling machine, Silent Piler™ Model 1, has been completed.
The world's first non-polluting pile driving and pulling machine, 'Silent Piler™' Unit 1, was completed.
Established the company Giken Seisakusho Co., Ltd.
Established Giken Manufacturing Co., Ltd.
January 6, 1978 (Showa 53).
Established
Released the Silent Piler™ KGK-100H.
Released 'Silent Piler™ KGK-100H'.
Opened the Osaka branch office.
Established the National SMP Association.
Established the National SMP Association.
Opened the Tokyo branch office.
Opened a Tokyo branch office.
Obtained the basic patent for the Silent Piler™.
Opened the Sendai branch office.
The static-load pile driver received the Shikoku Regional Innovation Award 'Innovation Encouragement Prize.'
Opened the Fukuoka branch office.
Replaced the first unit of 'Eco Cycle™' at Kochi Institute of Technology with a latest system.
Released the Silent Piler™ KGK-80C.
Opened the Nagoya branch office.
Changed the company name of Giken Kōchi Consulting Co., Ltd. to Giken Construction Co., Ltd.
Established a new dormant company, Giken Kōchi Consulting Co., Ltd.
Released the Silent Piler™ KGK-130N.
Introduced a radio control system to the Silent Piler™.
Released 'Silent Piler™ KGK-130N'.
Opened the Hiroshima and Shikoku branch offices.
Made its first appearance at the 20th International Construction Machinery Fair BAUMA'83 in Munich, Germany.
First exhibited at the 20th International Construction Machinery Fair 'BAUMA'83' in Munich, Germany.
Completed its first overseas project in West Germany (at the time).
The Tokyo factory was completed.
Released the Silent Piler™ KGK-130C4 (Corner 4 type).
The press-in method was officially adopted in the Ministry of Construction's "Civil Engineering Cost Estimation Standards".
Delivered the first overseas unit to Sweden.
The pile driving method was officially adopted into the Ministry of Construction's 'Civil Engineering Cost Estimation Standards'.
Released the City Piler FT70 (Full Turn type).
The Kochi headquarters and main factory were completed.
'Silent Piler™' reached production of 500 units.
The Silent Piler™ KGK-C4 type received the Special Award at the Machinery Industry Design Award (hosted by Nikkan Kogyo Shimbun).
National Pile Driving Association (JPA) Established
The Silent Piler™ achieved production of 500 units.
The City Piler FT70 won the Grand Prize at the 2nd Kochi Prefecture Local Industry Award (hosted by the Kochi Prefecture Local Industry Promotion Center).
Renovated 'Eco Park™' at the Kochi headquarters.
Released the Trench Piler TP333.
The Silent Piler™ received the Innovation Encouragement Award at the Shikoku Regional Innovation Awards.
Opened a sales office in Hokkaido.
Established Hokkaido Sales Office
The counterforce stand received the Innovation Encouragement Award at the Shikoku Regional Innovation Awards.
Opened an office in London.
Established London Office
Seiichi Kitamura received the Kochi Prefecture Industrial Technology Merit Award.
The Silent Piler™ surpassed production of 1,000 units.
The lifting device won the Grand Prize at the 5th Kochi Prefecture Local Industry Award.
Renewed the first EcoCycle™ inside Kochi University of Technology to the latest system
(Giken Seisakusho Co., Ltd.) registered its shares for public trading.
Established Giken Europe B.V. in the Netherlands.
The Clear Piler™ received the Kochi Prefecture Branch Manager Award at the Shikoku Regional Innovation Awards.
Released the auto-piler AT90 and AT150, an autonomous driving machine using IC cards.
Sei-Na Kitamura ranked first in Nikkei BP's 'Venture of the Year'.
Trench Piller TPII received the 6th Kōchi Prefecture Local Industry Award 'Encouragement Award'.
The GBS Project, which completes the GTOSS™, has started
Auto Piller AT90 and AT150 received the Good Design Award.
The autonomous technology of 'Silent Piller™' received the Shikoku Regional Innovation Award 'Patent Office Director's Encouragement Award'.
Established a new Tokyo headquarters in Shinagawa.
The Kansai factory was completed.
Giken Seisakusho Co., Ltd. listed its shares on the Second Section of the Tokyo Stock Exchange.
Proposed the 'Construction Method Revolution'.
Proposed a revolution in construction methods
'Silent Piller™' surpassed 1,500 units in production.
Formalized the 'Five Fundamental Principles of Construction'.
Giken Sekou Co., Ltd. established a new Tokyo sales office in Ariake, Koto-ku.
The transport device received the Shikoku Regional Innovation Award 'Invention Encouragement Award'.
Opened a Niigata branch office.
Established Kochi Second Factory
The first unit of the earthquake-resistant underground parking lot 'Eco Park™' was completed at the Kōchi headquarters.
Silent Piler™ ECO82 received the Grand Prize at the 4th Kochi Eco Industry Awards
The outdoor work shielding device received the Shikoku Regional Innovation Award 'Invention Encouragement Award'.
'Pile Laser™2' received the 38th Kōchi Prefecture Invention Competition 'Kōchi Mayor Award'.
Held a new product and new construction method presentation, launching Super Auto SA75 and SA100.
Established Giken Seisakusho Asia Pte., Ltd. in Singapore.
Established M&M Co., Ltd.
Acquired shares of C-TECH Co., Ltd.
Established G&B Co., Ltd.
Sei-ō Kitamura received the Prefectural Merit Award.
Eco Park™ received the Governor's Award at the 39th Kochi Prefecture Invention Contest.
The Jet Pipe Installation Device received the Shikoku Regional Invention Award – Small and Medium Enterprise Agency Director's Encouragement Prize.
Received the Excellent Company Award for Utilization of Industrial Property Rights System
First delivery of Silent Piler™ (SW100 model) in Australia
Launched the hard ground-compatible machine 'Crush Piler™ SC100' and the wide-width steel sheet pile insertion and withdrawal machine 'Super Wide SW100'
A.P.J. System received the 40th Kochi Prefecture Invention and Creativity Competition 'Governor's Award'
Giken Europe B.V. opened an office in Berlin
The first seismic underground bicycle parking lot 'Ecosycle™' was completed at Kochi University of Technology
Renovated EcoPark™ at Kochi Headquarters
Ecosycle™ received the 41st Kochi Prefecture Invention and Creativity Competition 'Governor's Award'
Giken Seisakusho Asia Pte., Ltd. completed its new building
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Crush Piler™ SC100 received the 13th Kochi Prefecture Local Industry Award 'Industry Award'
Giken America Corporation opened headquarters in New York
Received the Nikkei Construction Advertising Award
Established Giken America Corporation in Orlando, Florida
GRB System™ received the Japan Society of Mechanical Engineers Award (Technology)
Development of Silent Piler™ and pressing-in construction method awarded the Science and Technology Agency Director's Award '42nd Science and Technology Meritorious Person'
Development of Silent Piler™ and pressing method awarded the Science and Technology Agency Minister's Award at the 42nd Science and Technology Meritorious Service Awards
Relocated Tokyo Head Office to Ariake, Koto-ku
Obtained ISO9001 certification
Cable connector received the 43rd Kochi Prefecture Invention and Creativity Competition 'Kochi City Mayor's Award'
Jet nozzle device received the Shikoku Regional Invention Award 'Small and Medium Enterprise Agency Director's Award'
Obtained ISO 14001 certification
Centralized sales operations through IT promotion
Received the "Regional Industrial Technology Contribution Award" for developing a pressure‑insertion machine suitable for hard ground, contributing to Shikoku regional industrial technology promotion
Renewed the first EcoCycle™ inside Kochi University of Technology to the latest system
Giken Seisakusho Asia Pte., Ltd. opened a Hong Kong office
"GRB System™" received an environmental award and a quality award
Released the water jet system "Pilar Jet™"
"Clamp Crane™" received the Patent Office Director's Encouragement Award at the Shikoku Regional Invention Awards
One "Eco Cycle™" unit was completed in Setagaya‑ku, Setagaya, Tokyo
The hard ground clearance method received the Special Award at the 1st Kochi Eco Industry Award
Received the 32nd SME New Machine Development Award "Chairman of the Machinery Promotion Association Award" for developing a pressure‑insertion machine suitable for hard ground
Published the "Pressure Insertion Construction Guidelines" and released "Silent Piler™ ECO100"
Received the 32nd Medium and Small Enterprise New Machinery Development Award's President's Award for developing a hard ground-compatible pressing machine
"Pile Roller™" received the Kochi Prefecture Governor's Award at the 45th Kochi Prefecture Invention Competition
Received the Minister of Education, Culture, Sports, Science and Technology Award "44th Creative Innovation Merit Award" for inventing "P Lock™"
Launched the user support system "GTOSS™ (Jitos)"
"Eco Cycle™" received the Good Design Award
Held the "Pressure Insertion Method New Technology Presentation" in Ariake, Koto‑ku: announced the rotary cutting pressure‑insertion machine "Gyro Piler™" and the overseas Z‑shaped steel arrow plate pressure‑insertion machine "Z Piler (Z Crash Single & Double)"
The chuck attachment of the hybrid pressing machine received the Kochi Prefecture Invention Association President's Award at the Shikoku Regional Invention Awards
"Radio Control Holder™" received the Kochi Prefecture Industrial Association Chairman's Award at the 46th Kochi Prefecture Invention Competition
Completed an office building with "Earn‑Resilient Structural Foundation" style in Minato‑ku, Tokyo
Giken America Corporation opened a Los Angeles office
"Eco Cycle™" received the Grand Prize at the 18th Kochi Prefecture Local Industry Award
Four EcoCycle™ units were completed in Ebina City, Kanagawa Prefecture.
Received the Minister of Education, Culture, Sports, Science and Technology Award – 45th Creative Innovation Award – with the Pile Roller™.
Released the Silent Piler™ ECO82.
P Lock™ won the 47th Kochi Prefecture Invention Competition – Kochi Prefecture Industrial Association Chairman Award.
P-Lock™ received the 47th Kochi Prefecture Invention and Innovation Contest President's Award
Silent Piler™ ECO82 received the Grand Prize at the 4th Kochi Eco Industry Award.
Silent Piler™ ECO82 received the 4th Kochi Eco Industry Awards Grand Prize
Released Silent Piler™ ECO82-4C and ECO900.
An indoor mechanical bicycle parking facility, the largest in Japan, comprising eight EcoCycle™ units, was completed in Mitaka City, Tokyo.
Two EcoCycle™ units were completed in Jiyugaoka, Meguro Ward, Tokyo.
Giken America Corporation opened a Louisiana office in New Orleans.
Two EcoCycle™ units completed in Shinbashi, Minato-ku, Tokyo
Three EcoCycle™ units were completed on Ichiban Street, Marugame Town, Takamatsu City, Kagawa Prefecture.
GIKEN Eco Plaza Daido Shinagawa Building Parking Lot received the Special Award at the Japan Best Parking Awards.
Released Silent Piler™ ECO400S.
EcoCycle™ received the Minister of Economy, Trade and Industry Award at the 2nd Manufacturing Japan Award.
EcoCycle™ received the 2nd Monozukuri Japan Award Minister of Economy, Trade and Industry Award
One EcoCycle™ unit was completed in Wakayama City, Wakayama Prefecture.
The Hard Ground Clear Method received the Technical Development Award at the 1st Shikoku Branch of the Geotechnical Engineering Society.
Established a joint venture, Taiwan Technical Research and Manufacturing Co., Ltd., in Taipei City.
Launched the franchise-type business partnership GTOSS™ Membership GM2.
Released the overseas-oriented composite pressure-injection machine Silent Piler™ ECO700S and ECO1400S.
Selected as one of the 300 energetic manufacturing SMEs by the Ministry of Economy, Trade and Industry's Small and Medium Enterprise Agency.
The Memorial Forest Project was launched.
Developed the new EcoCycle™ and received orders from Hachioji City and Chiba City.
Developed new EcoCycle™, received orders in Hachioji City and Chiba City
The rigid ground-compatible press-in machine received the Shikoku Regional Innovation Award "Small and Medium Enterprise Agency Director's Encouragement Prize".
Held the GM2 certification ceremony and the first GM meeting.
Giken America Corporation established its headquarters in New York
Two EcoCycle™ units were completed at JR Chiba Station.
Launched the franchise-style business partnership "GTOSS™ Membership GM1".
Established the IPC (International Press-in Center) in Minato, Tokyo.
Six EcoCycle™ units were completed at JR Hachioji Station.
Five EcoCycle™ units were completed at the South Exit of JR Shinagawa Station.
Five EcoCycle™ units completed at Konan Exit of JR Shinagawa Station
Two EcoCycle™ units were completed in front of Hankyu Nankin-cho Station.
The ground excavation tool used in the rigid ground clearance method received the Shikoku Regional Innovation Award "Small and Medium Enterprise Agency Director's Encouragement Prize".
Replaced the first EcoCycle™ unit at Kochi Institute of Technology with the latest system.
Established the National Land Disaster Prevention Technology Headquarters.
Newly established National Land Disaster Prevention Technology Headquarters
Opened the National Land Disaster Prevention Technology Headquarters Rebuilding Support Office in Sendai.
Released the ZeroPillar™ JZ100A.
Released the SilentPillar™ ECO600S.
Established the Shanghai office.
Completed the prototype of the portable MobileEcoCycle™.
EcoCycle™ received the Shikoku Regional Innovation Award "President of the Invention Association Encouragement Prize".
EcoCycle™ awarded the Grand Prize at the Kochi Eco Industry Awards
Gyro Piler™ awarded the Minister of Economy, Trade and Industry Award at the 5th Manufacturing Japan Awards
Kochi Second Factory opened
Implant Breakwater™ awarded the Grand Prize at the 29th Kochi Prefecture Local Industry Awards
Two EcoCycle™ units completed in Shinbashi, Minato-ku, Tokyo
Eco Park™ completed at the new library complex
Market capitalization exceeds 100 billion yen
Kochi Third Factory completed
New factory and office building completed in the Netherlands
First unit of 'Silent Piler™' recognized as Mechanical Heritage by the Japan Society of Mechanical Engineers
Developed a mechanical parking lot 'EV Eco Park™' for ultra-compact electric vehicles
Certified as a 'DX Certified Business' by the Ministry of Economy, Trade and Industry
Giken America Corporation opened a New Jersey sales office
Awarded as a 'Cancer Countermeasure Promotion Excellence Company' in fiscal year Reiwa 7.
First adoption of 'Gyropress Construction Method™' in the UK, attracting attention as a new option to address flood issues hindering urban regeneration
Due to a service outage at Microsoft, there are delays and failures in sending and receiving emails at Giken Seisakusho Co., Ltd. The inquiry form is also unavailable, so please use phone or short message for urgent contact.
Tech Research & Manufacturing Co., Ltd. aims to enhance employees' sense of management participation and motivation by raising the incentive grant rate of its Employee Stock Ownership Plan from 15% to 30%. This increase significantly exceeds the previous average, creating a virtuous cycle of employee asset building and corporate value enhancement.
On November 5, 2026, an abnormality was detected on one of our business servers due to unauthorized access from outside, including ransomware. On the 6th, we blocked external connections and are continuing the investigation. Approximately 3,200 individuals—including users, designated factory personnel, and employees of our group—may have had their personal information leaked, as well as login IDs and passwords for a customer support system that were encrypted and stored. At this time, there is no evidence of external transmission or secondary damage, and we plan to notify affected individuals individually.
Video of the 2026 August Fiscal Year Earnings Presentation Released
An article about the 2026 August fiscal year earnings presentation was published on LogMe Finance. The article covers the full-year and fourth-quarter performance, earnings forecasts, segment and overseas regional conditions, shareholder returns, and business progress. It also includes a Q&A on the outlook for overseas operations.
We have published the notice of the 45th annual general meeting of shareholders. The meeting will be held at 10:00 a.m. on November 25, 2026, at the Rainbow Hall on the 3rd floor of Series in Kochi City. The agenda items include the disposal of surplus funds and the election of eight directors, and the business report and financial statements for the 45th term will be presented.
We have published the omitted items of the delivery documents included in the electronic provision measures of the 45th Annual General Meeting materials. The documents detail changes in shareholders' equity, including net profit for the period of 2,522, dividends from retained earnings of 1,531, and share buybacks of 2,000.
圧入技術研究開発センターの研究開発活動や成果を発信するウェブサイトを公開しました。施工・構造物・宇宙に関する研究開発の取組みのほか、論文や特許、学会発表、受賞などの最新情報を紹介しています。
The GyroPress™ steel pipe pile rotary cutting and pressure-insertion method developed by Giken Seisakusho Co., Ltd. was adopted for the elevated bridge replacement work in the underground conversion project of the Metropolitan Expressway in Nihonbashi, Tokyo. Near the Edo Bridge junction, while maintaining traffic exceeding 100,000 vehicles per day, a well-type foundation was constructed on hard ground, and the pressure-insertion of one pile was completed in July 2026. The company plans to further leverage the high constructability and versatility of this method to strengthen proposals for nationwide aging infrastructure remaking projects.
Tech Engineering Co., Ltd. decided to issue paid stock options (new share warrants) at the board meeting on October 22, 2026. The issuance was carried out without shareholder approval, and the exercise price is adjusted when the target stock price is achieved. The purpose is to provide incentives that promote corporate value improvement to directors, executive officers, employees, etc.