Tenox Corporation

Established Tenox Corporation in Minato-ku, Tokyo, and started sales and construction of concrete piles as an agent of Asahi Kasei Industries Corporation

Established Tenox Corporation in Minato-ku, Tokyo, and started sales and construction of concrete piles as an agent of Asahi Kasei Corporation

Relocated head office to 2-4-1 Akasaka, Minato-ku, Tokyo

Relocated head office to 2-4-1 Akasaka, Minato-ku, Tokyo

Signed a basic contract as an authorized dealer of Asahi Kasei Construction Materials Corporation

Concluded a basic contract as a dealer of Asahi Kasei Construction Materials Co., Ltd.

Obtained a patent for the construction method of precast piles (middle drilling method)

Obtained patent for the construction method of prefabricated piles (mid-excavation method)

Established Tenox Engineering Corporation in Minato-ku, Tokyo, as a construction equipment leasing company

Established Tenox Engineering Co., Ltd. for construction equipment leasing in Minato-ku, Tokyo

Opened Nagoya Sales Office in Nagoya City, Aichi Prefecture, to expand sales in the Chubu region

Established Nagoya Sales Office in Nagoya City, Aichi Prefecture to expand sales in the Chubu region

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

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

Obtained construction minister certification for CMJ method (middle drilling expansion root solidification method), jointly developed with Asahi Kasei Construction Materials

Obtained construction minister certification for CMJ method (core excavation expansion solidification method) developed jointly with Asahi Kasei Construction Materials Co., Ltd.

Established THAI TENOX CO., LTD in Bangkok, Thailand

Established THAI TENOX CO.,LTD in Bangkok, Kingdom of Thailand

Partnered with Sumitomo Cement Co., Ltd. to research and develop TenoColumn method using soil stabilization material

Partnered with Sumitomo Cement Co., Ltd. to research and develop TENOCO-LUM method using soil stabilization material

Obtained a patent for TenoColumn method

Obtained patent for TENOCO-LUM method

Obtained construction minister certification for TN method (middle drilling expansion root solidification method), jointly developed with Nippon Steel Corporation

Partnered with Nippon Steel Corporation for research and development of TN method (core excavation expansion solidification method) and obtained construction minister certification

Opened Numan Minami Equipment Center in Higashikatsushika-gun, Chiba Prefecture

Opened Numan Minami Equipment Center in Higashikatsushika District, Chiba Prefecture

Opened Funabashi Equipment Center in Funabashi City, Chiba Prefecture

Opened Funabashi Equipment Center in Funabashi City, Chiba Prefecture

Opened Osaka Sales Office in Osaka City, Osaka Prefecture, to expand sales in the Kansai region

Established Osaka Sales Office in Osaka City, Osaka Prefecture to expand sales in the Kansai region

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)

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)

Research and development of Gantetsu Pile Method (Steel Pipe Soil Cement Pile) in collaboration, obtaining Minister of Construction certification

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

Partnered for research and development of Gantetsu Pile Method (steel pipe soil cement pile) and obtained construction minister certification

Partnered with Misawa Homes to obtain construction minister certification for detached house foundation improvement based on TENOCO-LUM method

Established Hokuriku sales office in Kanazawa City, Ishikawa Prefecture to expand sales in the Hokuriku area (reorganized into Hokuriku Branch Office in April 2011)

Opened Hokuriku Sales Office in Kanazawa City, Ishikawa Prefecture (reorganized into Hokuriku Branch Office in April 2011)

Established Chugoku and Shikoku sales office in Hiroshima City, Hiroshima Prefecture to expand sales in the Chugoku and Shikoku regions

Opened Chugoku-Shikoku Sales Office in Hiroshima City, Hiroshima Prefecture

Established Tohoku sales office in Sendai City, Miyagi Prefecture to expand sales in the Tohoku region

Opened Tohoku Sales Office in Sendai City, Miyagi Prefecture

Obtained Minister of Construction certification for foundation improvement of detached houses based on Misawa Homes and Tenocolum Method

Partnered with Misawa Homes to obtain construction minister certification for detached house foundation improvement based on TENOCO-LUM method

Established Hokkaido sales office in Sapporo City, Hokkaido to expand sales in Hokkaido region

Opened Hokkaido Sales Office in Sapporo City, Hokkaido

Collaboration with Railway Technical Research Institute and Tokyu Construction on research and development of reinforcement method for existing embankments using mixing pile

Partnered with Railway Technical Research Institute and Tokyu Construction for research and development of reinforcement method for existing embankments using mixing pile

Partnership with Saga University on research and development of lightweight ground improvement method

Partnered with Saga University for research and development of lightweight ground improvement methods

Registered stocks with the Japan Securities Dealers Association

Registered stocks over-the-counter with the Japan Securities Dealers Association

Obtained Minister of Construction certification for extra large diameter piles using CMJ Method

Obtained construction minister certification for the CMJ method large-diameter piles

Relocated head office to 6-13-7 Akasaka, Minato-ku, Tokyo

Obtained technical review certification from the Land Development Technology Center for Gantetsu Pile Method

Relocated head office to 6-13-7 Akasaka, Minato-ku, Tokyo

Gantetsu pile method obtained technical review certification from the Foundation for Land Development Technology Center

Acquired Yamamoto Corporation as a subsidiary and renamed it Tenox Engineering Corporation

Acquired Yamamoto Corporation as a subsidiary and renamed it Tenox Giken Corporation

Tenox Engineering was absorbed and merged into Tenox Corporation

Established the Composite Technology Institute jointly with Railway Technical Research Institute to develop methods for strengthening and reinforcing ground

Tenox Giken Corporation merged with Tenox Engineering Corporation

Established a joint venture with the Railway Technology Research Institute to develop ground reinforcement and strengthening methods

Obtained technical review certification from the Advanced Construction Technology Center for Radish Anchor Method

Radish Anchor method obtained technical review certification from the Advanced Construction Technology Center

Integrated Funabashi Equipment Center and Numanami Equipment Center, and established Tokyo Equipment Center

Merged Funabashi Equipment Center and Numanami Equipment Center to open Tokyo Equipment Center in Funabashi, Chiba

Obtained Minister of Construction certification for Gantetsu Pile Method

Obtained technical review certification from the Advanced Construction Technology Center for Tenocolum Method

Gantetsu pile method and Tenkolum method obtained construction minister certification and technical review certification from the Advanced Construction Technology Center

Absorbed and merged with ProSpec Ltd.

Merged with Limited Company Prospec to clarify shareholder structure

Obtained Minister of Land, Infrastructure, Transport and Tourism certification for the ATT Column Method jointly developed with Asahi Kasei Building Materials.

Obtained Ministry of Land, Infrastructure, Transport and Tourism certification for the ATT column method developed jointly with Asahi Kasei Construction Materials

Obtained additional Minister of Land, Infrastructure, Transport and Tourism certification for the large-diameter ATT Column Method.

Obtained additional certification for large-diameter ATT column method from the Ministry of Land, Infrastructure, Transport and Tourism

Cancelled over-the-counter registration with the Japan Securities Dealers Association and listed shares on the JASDAQ Securities Exchange.

Cancelled over-the-counter registration with the Japan Securities Dealers Association and listed on the JASDAQ Securities Exchange

Obtained Minister of Land, Infrastructure, Transport and Tourism certification for the TN-X Method jointly developed with Nippon Steel.

Obtained Ministry of Land, Infrastructure, Transport and Tourism certification for the TN-X method developed jointly with Nippon Steel

Sold shares of THAI TENOX CO., LTD and made it a non-consolidated subsidiary.

Sold shares of THAI TENOX CO.,LTD and became a non-consolidated subsidiary

Obtained construction technology performance certification for the Pure Pile Method jointly developed with Japan Housing Guarantee Inspection Organization Inc.

Obtained construction technology performance certification for the Pure Pile method developed jointly with Japan Housing Warranty Inspection Organization

Listed on Osaka Securities Exchange JASDAQ following the merger of JASDAQ and Osaka Securities Exchange.

Merged JASDAQ Securities Exchange and Osaka Securities Exchange and listed on Osaka Securities Exchange JASDAQ

Relocated headquarters to 5-25-11 Shiba, Minato-ku, Tokyo.

Relocated head office to 5-25-11 Shiba, Minato-ku, Tokyo

Obtained construction technology performance certification for Pure Pile Method II.

Developed a base-balance method that provides low-cost liquefaction countermeasures for detached houses.

Obtained construction technology performance certification for Pure Pile Method II

Developed a base balance method for liquefaction countermeasures for detached houses supervised by Professor Emeritus Mamoru Fujii of Tokai University

Closed the Akita branch and opened the North Tohoku branch in Morioka City, Iwate Prefecture.

Closed Akita branch and opened North Tohoku branch in Morioka City, Iwate Prefecture

Listed on Tokyo Stock Exchange JASDAQ (Standard) following the integration of the Tokyo and Osaka Stock Exchanges.

Listed on Tokyo Stock Exchange JASDAQ (Standard) due to the integration of Tokyo Stock Exchange and Osaka Securities Exchange

Updated the technical review certification for the Tenocolumn Method, adding the ultra-high-concentration cementitious liquid 'Tenocolumn ECO Method'.

Updated the technical review certification of the TechnoColumn method (added use of ultra-high concentration solidification material liquid)

Obtained technical evaluation under the Civil Engineering Society's technical evaluation system for the ATT Column Method.

Obtained technical evaluation under the Civil Engineering Society of Japan's technical evaluation system

Obtained a patent for the Pure Pile Method.

Acquired patent for Pure Pile method

Opened the Koriyama branch in Koriyama City, Fukushima Prefecture.

Changed Tenox Kyushu Co., Ltd. and its subsidiary TENOX KYUSYU VIETNAM CO., LTD. from consolidated subsidiaries to equity-method affiliates.

Established Koriyama branch in Koriyama City, Fukushima Prefecture

Changed to equity method affiliate for TechnoX Kyushu Co., Ltd. and TENOX KYUSYU VIETNAM CO., LTD.

Established TENOX ASIA COMPANY LIMITED in Ho Chi Minh City, Socialist Republic of Vietnam.

Established TENOX ASIA COMPANY LIMITED in Ho Chi Minh City, Socialist Republic of Vietnam

Partially transferred shares of Tenox Kyushu Co., Ltd. and excluded from equity-method affiliates.

Transferred part of shares of TechnoX Kyushu Co., Ltd. and excluded from the equity method affiliates

Obtained the corporate standard (TCCS) for the Tenocore method in the Socialist Republic of Vietnam

Obtained corporate standard (TCCS) for TechnoColumn method in the Socialist Republic of Vietnam

Obtained certification for the Pure Pile Method Type III and construction technical performance certification

Obtained certification for Pure Pile Method Type III and construction technical performance certification

Renewal of technical review certification for the Tenocore method and advanced construction technology center (addition of remote monitoring and backup function construction management system)

Updated the technical review certification of the TechnoColumn method (added remote monitoring and backup function construction management system)

Celebrating the 50th anniversary of founding

Celebrated the 50th anniversary of founding

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

Acquired Hiroshima-gumi Co., Ltd. and Kame-take Sangyo Co., Ltd., and made them wholly owned subsidiaries (absorbed merger in February 2021)

Formed a business capital alliance with Japan Hume Co., Ltd. to strengthen concrete pile construction technology

Entered into a business capital alliance with Japan Hume Co., Ltd.

Formed a business capital alliance with Japan Concrete Industry Co., Ltd. to strengthen ESG management and cooperation in foundation work field

Entered into a business capital alliance with Japan Concrete Industry Co., Ltd.

Obtained certification for SDS-Pure Pile Method (support force calculation formula based on screw driver and sounding test results) and construction technical performance certification

Obtained construction technical performance certification for SDS-Pure Pile Method

Changed market to Tokyo Stock Exchange Standard Market and acquired Daisan Island Bussan to become a subsidiary

Changed market to Tokyo Stock Exchange Standard Market, acquired Daisojima Bussan, and made it a subsidiary

As part of sustainable construction foundation work, completed prototype of electric small pile driver DHJ-15E developed jointly with Nippon Sharyo Manufacturing

Prototype of electric small pile driver DHJ-15E co-developed with Japan Vehicle Manufacturing Co., Ltd. completed

Obtained construction technology review certification from the General Incorporated Foundation Better Living for the TN-X method (CP-X method)

TN-X construction method (CP-X construction method) has obtained construction technology review certification from the General Incorporated Foundation Better Living

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)

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

Obtained construction technology review certification from the General Foundation for Advanced Construction Center for the Tenocube method (shallow layered mixing treatment method)

Obtained construction technical performance certification for the PurePile Mass IV (Pure Pile Mash Block) method developed jointly with Japan Home Shield

Tenokube construction method (shallow layer mixing treatment method) has obtained construction technology review certification from the General Foundation for Advanced Construction Center

PurePile Mass IV (PurePile Mash B) method jointly developed with Japan Home Shield has obtained architectural technology performance certification

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

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