history

1990.11	Established Takeuchi House Co., Ltd.
1993.10	First application of the TNF construction method
1994.9	Company name changed to Takeuchi Construction Co., Ltd.
2005.7	Reorganized as Takeuchi Construction Co., Ltd. with an increase in capital
2007.11	First overseas application of the TNF method in Nam Sach Industrial Park, Vietnam
2009.8	Achieved 100 completed TNF method projects
2009.9	Capital increased to 25 million yen
2010.6	Capital increased to 50 million yen
2011.4	Established the “TNF Method Association”
2012.4	Developed and began applying the “T-BAGS seismic reduction method”
2013.10	Opened the Tokyo Sales office (Higashi-Ueno, Taito-ku, Tokyo)
2015.2	Achieved 500 completed TNF method projects
2016.11	Established local subsidiary Vina Takeuchi Co., Ltd. in Ho Chi Minh City, Vietnam
2018.4	Achieved 1,000 completed TNF method projects
2018.11	Obtained patent for the “TNF-D method”
2021.4	Obtained patent for the “TNF-DD method”
2021.8	Achieved 1,500 completed TNF method projects
2022.11	Obtained patent for the “TNF 2.0 Ground Improvement Structure”
2023.7	Opened the Fukuoka Sales Office (Motomachi, Kurume City, Fukuoka Prefecture)
2024.7	Merged with T&P Design Office Co., Ltd. (subsidiary)
2024.7	Opened Nagoya office (Naka-ku, Nagoya City, Aichi Prefecture)
2025.4	Achievement of 2,000 TNF Construction Projects Opening of the Hokkaido Sales Office