| Company name | Group | Parent | Subsidiary | Customer | Supplier | Alliance | Bank | Shareholder |
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| Yamaguchi Earth Engineering Co., Ltd. | ||||||||
| Shimane Earth Engineering Co., Ltd. | ||||||||
| Ehime Earth Engineering Co., Ltd. | ||||||||
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| Fukui Earth Engineering Co., Ltd. | ||||||||
| Asao Foamcrete Corporation |
In 1938 (Showa 13), the construction of the 240 million cubic meter Ryūryū First Dam reservoir project began at the foot of the Daisetsuzan Mountains in Hokkaido. It was a 45.5-meter-high gravity concrete dam, and considerable effort was expended at the time to treat the angular gravel conglomerate rock foundation. Nitto's technology began here.
Founded in 1947 (Showa 22), the company entered its heyday during the boom of dam power plant construction associated with power development. Dam foundation work became the founding trade, and the company’s technology, led by civil and geotechnical engineers working together, was highly regarded by related parties. We have carried out the majority of domestic large dam foundation works, including the Kanda Kuroshi Dam.
Our company was founded in 1947 (Showa 22) and reached its heyday during the development of power generation and dam construction. We pioneered dam foundation work as our founding trade, especially with civil and geological engineers working together, and our comprehensive capabilities have been highly regarded by related parties. We have carried out the majority of major domestic dam foundation work, including the Kuroshi Dam of Kanda Electric Power.
In April 1953, Yachiyo Underground Engineering Co., Ltd. was established in Sapporo, Hokkaido, primarily for geological surveys and foundation work.
In January 1957, the head office was moved to Minato-ku, Tokyo.
In December 1959, the company name was changed to Nihon Special Civil Engineering Co., Ltd.
June 1, 1961 (Showa 36)
Capital: 209 million yen (as of March 2024)
In December 1961, the head office was moved to Chiyoda-ku, Tokyo.
In December 1962, due to a change in the nominal value of shares, Nihon Special Civil Engineering Co., Ltd. (which had changed its name and business purpose from Kōshōkai Co., Ltd., established in December 1947) was absorbed and merged.
In February 1963, Nihon Public Co., Ltd. was established.
In March 1965, the head office was moved to Ginza, Chuo-ku, Tokyo.
In 1972 (Showa 47), with the name change to the current one, the company expanded its business scope and has accumulated achievements across a wide range of fields, including dam construction, rivers, roads, water supply and drainage, land reclamation, and architectural construction.
In May 1972, the company name was changed to Nitto Construction Co., Ltd.
In October 1972, received Minister of Construction permission (Special-47) No. 211.
In December 1979, Ryukōsan Co., Ltd. was established (currently a consolidated subsidiary).
December 5, 1979 (Showa 54)
Established
In October 1983, obtained a license for real estate transactions and Minister of Construction license (1) No. 3193.
In December 1983, listed on the Second Section of the Tokyo Stock Exchange.
In April 1985, Nitto Real Estate Co., Ltd. was established.
June 1985: Completion of the Main Office Joint Building (Ginza Showa Dori Building).
September 1985: Listed on the First Section of the Tokyo Stock Exchange.
October 1985: Established Hi-Tech Lease Co., Ltd. (consolidated subsidiary).
March 1986: Completion of Tsukuba Research Institute.
May 1990: Established Dome Construction Industry Co., Ltd. (non-consolidated subsidiary).
May 1990: Established Dome Construction Industry Co., Ltd. (non-consolidated subsidiary)
June 1990: Completion of Akashi-cho Branch Office Building.
March 2001: Liquidated Nikko Real Estate Co., Ltd. (consolidated subsidiary).
March 2003: Company-wide ISO 9001 audit registration.
November 2003: Liquidated Japan Public Co., Ltd. (consolidated subsidiary).
October 2004: Established Shimane Earth Engineering Co., Ltd. (currently a consolidated subsidiary).
October 22, 2004 (Heisei 16)
Established
March 2008: Closure of Tsukuba Research Institute.
March 2009: Liquidated Hi-Tech Lease Co., Ltd. (consolidated subsidiary).
September 2010: Liquidated Dome Construction Industry Co., Ltd. (non-consolidated subsidiary).
December 2013: Established Yamaguchi Earth Engineering Co., Ltd. (currently a consolidated subsidiary).
December 20, 2013 (Heisei 25)
Established
November 17, 2015 (Heisei 27)
Established
December 2015: Moved headquarters to Higashi-Nihonbashi, Chuo-ku, Tokyo.
March 2016: Established PT Nittoc Construction Indonesia (currently a consolidated subsidiary).
January 2019: Established Ehime Earth Engineering Co., Ltd. (currently a consolidated subsidiary).
January 21, 2019 (Heisei 31)
Established
October 2021: Established Fukui Earth Engineering Co., Ltd. (currently a consolidated subsidiary).
October 8, 2021 (Reiwa 3)
Established
April 2022: Listed on the Tokyo Stock Exchange Prime Market.
April 2022: Listed on the Tokyo Stock Exchange Prime Market
February 2025: Consolidated Aso Foam Cret Co., Ltd. as a subsidiary.
Nittoku Construction Co., Ltd. will exhibit in the Ground Improvement Technology section of Geotechnical Technology Forum 2026, held at Tokyo Big Sight from September 16 to 18. Booth G-48 will feature the N-Jet high-pressure jet mixing method, the GroutConductor chemical grouting control and monitoring system, and the N.Roll Column method, which combines high-pressure jet mixing with mechanical mixing.
Nittoc Construction Co., Ltd. jointly developed low-carbon shotcrete for slope protection works with Obayashi Corporation. The material replaces 75% of ordinary Portland cement with ground granulated blast-furnace slag, reducing CO₂ emissions during production by about 71%. It is suitable for both on-site mixing and factory supply and is expected to be used in civil engineering.
Nittoc Construction Co., Ltd. will exhibit for the first time at Nikkei-TSE IR Fair 2026, held at Tokyo Big Sight on August 29, 2026. Its booth will host briefings on the company's business and performance trends and distribute investor relations materials and giveaways. A briefing by the vice president is also planned to help individual investors better understand the company.
Nittoku Construction Co., Ltd. endorsed the My Human Rights Declaration, and its declaration has been posted on the initiative's website. The company is working to respect human rights and help realize a sustainable society.
Nittoku Construction will participate in Tokyo Game Show 2026, displaying remote construction systems utilizing gaming technology and interactive mini-games. Incorporating real-time video and operation support UI, the company aims to demonstrate the potential of technology to solve construction site challenges.
Nittoku Construction Co., Ltd. will participate in the technical exhibition corner of the 61st Geotechnical Engineering Research Presentation held at the Granship in Shizuoka from July 7 to 9, 2026.
Nittoc Construction Co., Ltd. has released a video of the explanatory materials for its 78th annual general meeting of shareholders. The video explains the reports, technology introductions, resolutions, and issues discussed on the day. It provides information for shareholders and other stakeholders.
The archive video of the WEB live company briefing hosted by Nomura IR held on May 25, 2026, has been released, explaining the financial summary and medium-term management plan.
Nitto Construction has published the transcript of its March 2026 fiscal year earnings and mid-term management plan briefing on "Logme Finance", aiming to share information and promote understanding with investors.
An interview with Nittoku Construction's President and CEO, Naoto Ue, is published in the June 2026 issue of the 'Shareholder's Notebook,' discussing long-term goals and strategies.