In 1938, the construction of Uryuu Dai-ichi Dam for a huge water reservoir with a reservoir capacity of 240 million cubic meters commenced at the foot of Mt. Taisetsu in Hokkaido.
The dam was a gravity type concrete structure 45.5 meters high and in order to lead the project to a successful completion, an extraordinary amount of energy was poured into improving existing techniques and technologies for the disposal of the breccia-conglomerate at the site of the foundation.
A variety of innovative technologies accumulated to date at Nittoc originated through this project.
- 1947
- Company established in Hokkaido by Takuichi MATSUSHITA
- 1953
- Renamed Yachiyo Chika Kogyo
- 1957
- Headquarters relocated to Tokyo (Minato-ku)
- 1959
- Renamed Nippon Tokushu Doboku Kogyo
- 1961
- Headquarters relocated to Tokyo (Chuo-ku)
- 1962
- Participated in Mendoza Electric Power Development Project in Argentina
- 1963
- Completed Kurobe Dai-yon Dam Project
- 1964
- Established representative office in Hong Kong(Made into a local subsidiary in the following year)
- 1967
- Concluded business tie-up providing technical guidance in dam grouting and cooperated with local construction company in Taipei (Taiwan)
- 1971
- Participated in the 12th Antarctic expedition project in Antarctica (Continued to work on a glacier investigation project in Antarctica, the North Pole and Himalayas until 1983)
- 1972
- Established Nittoc Construction Co., Ltd. Participated in Parana Hydraulic Power Generation Development Project (Brazil)
- 1980
- Participated in Agoyan Hydraulic Power Generation Development Project (Ecuador)
- 1985
- Shares listed on 1st section of Tokyo Stock Exchange Concluded business tie-up providing technical vegetation and slope protection with local construction company in Taipei (Taiwan)
- 1988
- Established a local corporation to exploit mineral resource development in Queensland (Australia)
- 1989
- Participated in Marsyangdi Hydroelectric Power Project (Nepal)
- 2003
- Received ISO9001 certification in Japan
- 2005
- Suspended international business activities
- 2012
- Established international section under company Headquarters and recommenced international business activities Established representative office in Jakarta (Indonesia)
- 2013
- Reorganized international section (Later formed into International Department）
- 2015
- Relocated head office to Higashi Nihonbashi, Chuo-ku, Tokyo
- 2016
- Established as PT NITTOC CONSTRUCTION INDONESIA (currently a consolidated subsidiary)
- 2019
- Established as Ehime Earth Engineering Co., Ltd. (currently a consolidated subsidiary)
- 2021
- Established as Fukui Earth Engineering Co., Ltd. (currently a consolidated subsidiary)
- 2022
- listing of shares on Tokyo Stock Exchange Prime Market