| 1970-07 |
Established Tenox Corporation in Minato-ku, Tokyo, and started sales and construction of concrete piles as an agent of Asahi Kasei Industries Corporation |
| 1970-07 |
Established Tenox Corporation in Minato-ku, Tokyo, and started sales and construction of concrete piles as an agent of Asahi Kasei Corporation |
| 1972-12 |
Relocated head office to 2-4-1 Akasaka, Minato-ku, Tokyo |
| 1972-12 |
Relocated head office to 2-4-1 Akasaka, Minato-ku, Tokyo |
| 1976-10 |
Signed a basic contract as an authorized dealer of Asahi Kasei Construction Materials Corporation |
| 1976-10 |
Concluded a basic contract as a dealer of Asahi Kasei Construction Materials Co., Ltd. |
| 1977-02 |
Obtained a patent for the construction method of precast piles (middle drilling method) |
| 1977-02 |
Obtained patent for the construction method of prefabricated piles (mid-excavation method) |
| 1977-03 |
Established Tenox Engineering Corporation in Minato-ku, Tokyo, as a construction equipment leasing company |
| 1977-03 |
Established Tenox Engineering Co., Ltd. for construction equipment leasing in Minato-ku, Tokyo |
| 1977-07 |
Opened Nagoya Sales Office in Nagoya City, Aichi Prefecture, to expand sales in the Chubu region |
| 1977-07 |
Established Nagoya Sales Office in Nagoya City, Aichi Prefecture to expand sales in the Chubu region |
| 1980-03 |
Formed a partnership with Nippon Steel Corporation (now Nippon Steel Corporation) for research and development of low-vibration, low-noise pile foundations using steel pipe piles and steel pipe sheet piles |
| 1980-03 |
Partnered with Nippon Steel Corporation (now Nippon Steel Corporation) for research and development of low-vibration, low-noise pile foundation methods using steel pipe piles and steel pipe sheet piles |
| 1980-05 |
Obtained construction minister certification for CMJ method (middle drilling expansion root solidification method), jointly developed with Asahi Kasei Construction Materials |
| 1980-05 |
Obtained construction minister certification for CMJ method (core excavation expansion solidification method) developed jointly with Asahi Kasei Construction Materials Co., Ltd. |
| 1982-04 |
Established THAI TENOX CO., LTD in Bangkok, Thailand |
| 1982-04 |
Established THAI TENOX CO.,LTD in Bangkok, Kingdom of Thailand |
| 1983-10 |
Partnered with Sumitomo Cement Co., Ltd. to research and develop TenoColumn method using soil stabilization material |
| 1983-10 |
Partnered with Sumitomo Cement Co., Ltd. to research and develop TENOCO-LUM method using soil stabilization material |
| 1984-03 |
Obtained a patent for TenoColumn method |
| 1984-03 |
Obtained patent for TENOCO-LUM method |
| 1985-05 |
Obtained construction minister certification for TN method (middle drilling expansion root solidification method), jointly developed with Nippon Steel Corporation |
| 1985-05 |
Partnered with Nippon Steel Corporation for research and development of TN method (core excavation expansion solidification method) and obtained construction minister certification |
| 1985-08 |
Opened Numan Minami Equipment Center in Higashikatsushika-gun, Chiba Prefecture |
| 1985-08 |
Opened Numan Minami Equipment Center in Higashikatsushika District, Chiba Prefecture |
| 1986-07 |
Opened Funabashi Equipment Center in Funabashi City, Chiba Prefecture |
| 1986-07 |
Opened Funabashi Equipment Center in Funabashi City, Chiba Prefecture |
| 1987-05 |
Opened Osaka Sales Office in Osaka City, Osaka Prefecture, to expand sales in the Kansai region |
| 1987-05 |
Established Osaka Sales Office in Osaka City, Osaka Prefecture to expand sales in the Kansai region |
| 1987-12 |
Established Tenox Kyushu Corporation in Omuta City, Fukuoka Prefecture, for sales expansion and construction system development in Kyushu (relocated to Fukuoka City in July 1988) |
| 1987-12 |
Established TENOX Kyushu Co., Ltd. in Omuta City, Fukuoka Prefecture for sales expansion and construction system development in Kyushu region (later relocated to Fukuoka City) |
| 1988-08 |
Research and development of Gantetsu Pile Method (Steel Pipe Soil Cement Pile) in collaboration, obtaining Minister of Construction certification |
| 1988-08 |
Collaboration with Misawa Homes on research and development for foundation improvement of detached houses based on Tenocolum Method, obtaining Minister of Construction certification and practical application |
| 1988-08 |
Partnered for research and development of Gantetsu Pile Method (steel pipe soil cement pile) and obtained construction minister certification |
| 1988-08 |
Partnered with Misawa Homes to obtain construction minister certification for detached house foundation improvement based on TENOCO-LUM method |
| 1988-11 |
Established Hokuriku sales office in Kanazawa City, Ishikawa Prefecture to expand sales in the Hokuriku area (reorganized into Hokuriku Branch Office in April 2011) |
| 1988-11 |
Opened Hokuriku Sales Office in Kanazawa City, Ishikawa Prefecture (reorganized into Hokuriku Branch Office in April 2011) |
| 1989-02 |
Established Chugoku and Shikoku sales office in Hiroshima City, Hiroshima Prefecture to expand sales in the Chugoku and Shikoku regions |
| 1989-02 |
Opened Chugoku-Shikoku Sales Office in Hiroshima City, Hiroshima Prefecture |
| 1989-07 |
Established Tohoku sales office in Sendai City, Miyagi Prefecture to expand sales in the Tohoku region |
| 1989-07 |
Opened Tohoku Sales Office in Sendai City, Miyagi Prefecture |
| 1989-09 |
Obtained Minister of Construction certification for foundation improvement of detached houses based on Misawa Homes and Tenocolum Method |
| 1989-09 |
Partnered with Misawa Homes to obtain construction minister certification for detached house foundation improvement based on TENOCO-LUM method |
| 1990-12 |
Established Hokkaido sales office in Sapporo City, Hokkaido to expand sales in Hokkaido region |
| 1990-12 |
Opened Hokkaido Sales Office in Sapporo City, Hokkaido |
| 1991-05 |
Collaboration with Railway Technical Research Institute and Tokyu Construction on research and development of reinforcement method for existing embankments using mixing pile |
| 1991-05 |
Partnered with Railway Technical Research Institute and Tokyu Construction for research and development of reinforcement method for existing embankments using mixing pile |
| 1991-06 |
Partnership with Saga University on research and development of lightweight ground improvement method |
| 1991-06 |
Partnered with Saga University for research and development of lightweight ground improvement methods |
| 1991-11 |
Registered stocks with the Japan Securities Dealers Association |
| 1991-11 |
Registered stocks over-the-counter with the Japan Securities Dealers Association |
| 1993-02 |
Obtained Minister of Construction certification for extra large diameter piles using CMJ Method |
| 1993-02 |
Obtained construction minister certification for the CMJ method large-diameter piles |
| 1995-03 |
Relocated head office to 6-13-7 Akasaka, Minato-ku, Tokyo |
| 1995-03 |
Obtained technical review certification from the Land Development Technology Center for Gantetsu Pile Method |
| 1995-03 |
Relocated head office to 6-13-7 Akasaka, Minato-ku, Tokyo |
| 1995-03 |
Gantetsu pile method obtained technical review certification from the Foundation for Land Development Technology Center |
| 1995-09 |
Acquired Yamamoto Corporation as a subsidiary and renamed it Tenox Engineering Corporation |
| 1995-09 |
Acquired Yamamoto Corporation as a subsidiary and renamed it Tenox Giken Corporation |
| 1997-04 |
Tenox Engineering was absorbed and merged into Tenox Corporation |
| 1997-04 |
Established the Composite Technology Institute jointly with Railway Technical Research Institute to develop methods for strengthening and reinforcing ground |
| 1997-04 |
Tenox Giken Corporation merged with Tenox Engineering Corporation |
| 1997-04 |
Established a joint venture with the Railway Technology Research Institute to develop ground reinforcement and strengthening methods |
| 1997-11 |
Obtained technical review certification from the Advanced Construction Technology Center for Radish Anchor Method |
| 1997-11 |
Radish Anchor method obtained technical review certification from the Advanced Construction Technology Center |
| 1998-05 |
Integrated Funabashi Equipment Center and Numanami Equipment Center, and established Tokyo Equipment Center |
| 1998-05 |
Merged Funabashi Equipment Center and Numanami Equipment Center to open Tokyo Equipment Center in Funabashi, Chiba |
| 1998-10 |
Obtained Minister of Construction certification for Gantetsu Pile Method |
| 1998-10 |
Obtained technical review certification from the Advanced Construction Technology Center for Tenocolum Method |
| 1998-10 |
Gantetsu pile method and Tenkolum method obtained construction minister certification and technical review certification from the Advanced Construction Technology Center |
| 2001-03 |
Absorbed and merged with ProSpec Ltd. |
| 2001-03 |
Merged with Limited Company Prospec to clarify shareholder structure |
| 2002-07 |
Obtained Minister of Land, Infrastructure, Transport and Tourism certification for the ATT Column Method jointly developed with Asahi Kasei Building Materials. |
| 2002-07 |
Obtained Ministry of Land, Infrastructure, Transport and Tourism certification for the ATT column method developed jointly with Asahi Kasei Construction Materials |
| 2003-07 |
Obtained additional Minister of Land, Infrastructure, Transport and Tourism certification for the large-diameter ATT Column Method. |
| 2003-07 |
Obtained additional certification for large-diameter ATT column method from the Ministry of Land, Infrastructure, Transport and Tourism |
| 2004-12 |
Cancelled over-the-counter registration with the Japan Securities Dealers Association and listed shares on the JASDAQ Securities Exchange. |
| 2004-12 |
Cancelled over-the-counter registration with the Japan Securities Dealers Association and listed on the JASDAQ Securities Exchange |
| 2005-06 |
Obtained Minister of Land, Infrastructure, Transport and Tourism certification for the TN-X Method jointly developed with Nippon Steel. |
| 2005-06 |
Obtained Ministry of Land, Infrastructure, Transport and Tourism certification for the TN-X method developed jointly with Nippon Steel |
| 2005-12 |
Sold shares of THAI TENOX CO., LTD and made it a non-consolidated subsidiary. |
| 2005-12 |
Sold shares of THAI TENOX CO.,LTD and became a non-consolidated subsidiary |
| 2010-02 |
Obtained construction technology performance certification for the Pure Pile Method jointly developed with Japan Housing Guarantee Inspection Organization Inc. |
| 2010-02 |
Obtained construction technology performance certification for the Pure Pile method developed jointly with Japan Housing Warranty Inspection Organization |
| 2010-04 |
Listed on Osaka Securities Exchange JASDAQ following the merger of JASDAQ and Osaka Securities Exchange. |
| 2010-04 |
Merged JASDAQ Securities Exchange and Osaka Securities Exchange and listed on Osaka Securities Exchange JASDAQ |
| 2011-12 |
Relocated headquarters to 5-25-11 Shiba, Minato-ku, Tokyo. |
| 2011-12 |
Relocated head office to 5-25-11 Shiba, Minato-ku, Tokyo |
| 2012-02 |
Obtained construction technology performance certification for Pure Pile Method II. |
| 2012-02 |
Developed a base-balance method that provides low-cost liquefaction countermeasures for detached houses. |
| 2012-02 |
Obtained construction technology performance certification for Pure Pile Method II |
| 2012-02 |
Developed a base balance method for liquefaction countermeasures for detached houses supervised by Professor Emeritus Mamoru Fujii of Tokai University |
| 2013-04 |
Closed the Akita branch and opened the North Tohoku branch in Morioka City, Iwate Prefecture. |
| 2013-04 |
Closed Akita branch and opened North Tohoku branch in Morioka City, Iwate Prefecture |
| 2013-07 |
Listed on Tokyo Stock Exchange JASDAQ (Standard) following the integration of the Tokyo and Osaka Stock Exchanges. |
| 2013-07 |
Listed on Tokyo Stock Exchange JASDAQ (Standard) due to the integration of Tokyo Stock Exchange and Osaka Securities Exchange |
| 2013-10 |
Updated the technical review certification for the Tenocolumn Method, adding the ultra-high-concentration cementitious liquid 'Tenocolumn ECO Method'. |
| 2013-10 |
Updated the technical review certification of the TechnoColumn method (added use of ultra-high concentration solidification material liquid) |
| 2014-03 |
Obtained technical evaluation under the Civil Engineering Society's technical evaluation system for the ATT Column Method. |
| 2014-03 |
Obtained technical evaluation under the Civil Engineering Society of Japan's technical evaluation system |
| 2015-03 |
Obtained a patent for the Pure Pile Method. |
| 2015-03 |
Acquired patent for Pure Pile method |
| 2015-04 |
Opened the Koriyama branch in Koriyama City, Fukushima Prefecture. |
| 2015-04 |
Changed Tenox Kyushu Co., Ltd. and its subsidiary TENOX KYUSYU VIETNAM CO., LTD. from consolidated subsidiaries to equity-method affiliates. |
| 2015-04 |
Established Koriyama branch in Koriyama City, Fukushima Prefecture |
| 2015-04 |
Changed to equity method affiliate for TechnoX Kyushu Co., Ltd. and TENOX KYUSYU VIETNAM CO., LTD. |
| 2015-09 |
Established TENOX ASIA COMPANY LIMITED in Ho Chi Minh City, Socialist Republic of Vietnam. |
| 2015-09 |
Established TENOX ASIA COMPANY LIMITED in Ho Chi Minh City, Socialist Republic of Vietnam |
| 2017-01 |
Partially transferred shares of Tenox Kyushu Co., Ltd. and excluded from equity-method affiliates. |
| 2017-01 |
Transferred part of shares of TechnoX Kyushu Co., Ltd. and excluded from the equity method affiliates |
| 2018-08 |
Obtained the corporate standard (TCCS) for the Tenocore method in the Socialist Republic of Vietnam |
| 2018-08 |
Obtained corporate standard (TCCS) for TechnoColumn method in the Socialist Republic of Vietnam |
| 2019-03 |
Obtained certification for the Pure Pile Method Type III and construction technical performance certification |
| 2019-03 |
Obtained certification for Pure Pile Method Type III and construction technical performance certification |
| 2020-06 |
Renewal of technical review certification for the Tenocore method and advanced construction technology center (addition of remote monitoring and backup function construction management system) |
| 2020-06 |
Updated the technical review certification of the TechnoColumn method (added remote monitoring and backup function construction management system) |
| 2020-07 |
Celebrating the 50th anniversary of founding |
| 2020-07 |
Celebrated the 50th anniversary of founding |
| 2020-10 |
Acquired Hiroshima-gumi Co., Ltd. and Kametake Sangyo Co., Ltd. to strengthen construction system and sales capabilities in Kansai area, and fully integrated Hiroshima-gumi as the surviving company in February 2021 |
| 2020-10 |
Acquired Hiroshima-gumi Co., Ltd. and Kame-take Sangyo Co., Ltd., and made them wholly owned subsidiaries (absorbed merger in February 2021) |
| 2020-12 |
Formed a business capital alliance with Japan Hume Co., Ltd. to strengthen concrete pile construction technology |
| 2020-12 |
Entered into a business capital alliance with Japan Hume Co., Ltd. |
| 2021-01 |
Formed a business capital alliance with Japan Concrete Industry Co., Ltd. to strengthen ESG management and cooperation in foundation work field |
| 2021-01 |
Entered into a business capital alliance with Japan Concrete Industry Co., Ltd. |
| 2021-10 |
Obtained certification for SDS-Pure Pile Method (support force calculation formula based on screw driver and sounding test results) and construction technical performance certification |
| 2021-10 |
Obtained construction technical performance certification for SDS-Pure Pile Method |
| 2022-04 |
Changed market to Tokyo Stock Exchange Standard Market and acquired Daisan Island Bussan to become a subsidiary |
| 2022-04 |
Changed market to Tokyo Stock Exchange Standard Market, acquired Daisojima Bussan, and made it a subsidiary |
| 2024-03 |
As part of sustainable construction foundation work, completed prototype of electric small pile driver DHJ-15E developed jointly with Nippon Sharyo Manufacturing |
| 2024-03 |
Prototype of electric small pile driver DHJ-15E co-developed with Japan Vehicle Manufacturing Co., Ltd. completed |
| 2024-07 |
Obtained construction technology review certification from the General Incorporated Foundation Better Living for the TN-X method (CP-X method) |
| 2024-07 |
TN-X construction method (CP-X construction method) has obtained construction technology review certification from the General Incorporated Foundation Better Living |
| 2024-11 |
Obtained technical appraisal from the General Incorporated Foundation Better Living for the CP-X method (prefabricated concrete pile high support capacity deep expansion root solidification method) |
| 2024-11 |
CP-X construction method (precast concrete pile high support capacity mid-bore expansion root solidification method) has obtained a technical evaluation regarding the support capacity calculation method for foundation piles from the General Incorporated Foundation Better Living |
| 2025-01 |
Obtained construction technology review certification from the General Foundation for Advanced Construction Center for the Tenocube method (shallow layered mixing treatment method) |
| 2025-01 |
Obtained construction technical performance certification for the PurePile Mass IV (Pure Pile Mash Block) method developed jointly with Japan Home Shield |
| 2025-01 |
Tenokube construction method (shallow layer mixing treatment method) has obtained construction technology review certification from the General Foundation for Advanced Construction Center |
| 2025-01 |
PurePile Mass IV (PurePile Mash B) method jointly developed with Japan Home Shield has obtained architectural technology performance certification |
| 2025-12 |
Formed a capital and business alliance with Japan Home Shield to develop and deploy foundation methods for earthquake-resistant detached houses and to mutually utilize ground data and sales infrastructure |
| 2025-12 |
For the development and deployment of foundation methods for earthquake-resistant detached houses and mutual utilization of ground data and sales infrastructure, a capital and business alliance was formed with Japan Home Shield |
