- Business
- Tenox Corporation (1905.T), founded on July 8, 1970 and headquartered at Hulic Mita Bldg., 5-25-11 Shiba, Minato-ku, Tokyo 108-8380, Japan, specializes in foundation construction works for civil engineering and building projects; it provides pile driving construction contracting, ground improvement construction contracting, sales of concrete piles and steel pipe piles, construction equipment rental, civil engineering and construction consulting services, and real estate leasing. The company operates primarily in Japan through sales offices and equipment centers across regions including Tohoku, Hokuriku, Chubu, Kansai, Chugoku-Shikoku, Kyushu, and Hokkaido, with overseas foundation construction activities conducted via subsidiary TENOX ASIA COMPANY LIMITED in Vietnam; affiliated entities such as Tenox Giken Co., Ltd. support foundation construction contracting and equipment rentals, while Hiroshimagumi Co., Ltd., OHMISHIMA BUSSAN CO., Ltd., and the Integrated Geotechnology Institute Limited handle additional construction, mediation, and consulting services. Core proprietary methods include the patented Tenocolumn deep mixing method for ground improvement and load-bearing foundations, CMJ method for concrete piles, TN and TN-X methods for steel pipe piles, ATTcolumn, Pure Pile methods, and Gantetsu Pile; the company holds licenses for scaffolding, earthwork, civil engineering, paving, and landscaping from the Minister of Land, Infrastructure, Transport and Tourism. Recent developments feature the launch of the CP-X construction method in the last fiscal year to reduce residual soil in concrete pile works, ongoing research into soil liquefaction control and low-CO2 emission techniques including the world's first electric small pile driver, relocation of the head office to promote sustainable growth and new working styles as announced in October 2025, and transition to the Tokyo Stock Exchange Standard Market in April 2022 following the acquisition of Ohmishima Bussan Co., Ltd.; consolidated net sales exceeded ¥23.7 billion for the fiscal year ended March 31, 2025, with 369 employees.