History of Asunaro Aoki Construction
1940~2003
Asunaro Construction (previously known as Komatsu Construction Industry)
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1950
-
1950/9
Established Fuso Doboku Co., Ltd.
-
1959/6
Established Komatsu Doro Kensetsu Co., Ltd.
(wholly owned by Komatsu Ltd.)
-
-
1960
-
1960/5
Merged Fuso Doboku Co., Ltd. and Komatsu Doro Kensetsu, and the resulting company was renamed Komatsu Fuso Construction Co., Ltd.
-
1961
Awarded the Koura construction section of the Meishin Expressway.
-
1962/11
The Company name was changed to Komatsu Construction Industry Co., Ltd.
-
1964
Awarded the new construction of the Komatsu buildings and Meishin Expressway Komaki construction zone.
-
1966
Construction began on Komatsu’s Oyama Plant.
-
1967
Construction began on the Awazu and Osaka Plants of Komatsu.
-
-
1970
-
1970
Executed the first construction project using the amphibious bulldozer (river channel maintenance).
-
1971
Awarded the Higashi Osaka construction section of the Hanshin Expressway.
-
1973/7
Established Komatsu Paving Co., Ltd.
-
1973
Miyagi New Town Development, Nagayo New Town Development Construction, and Large-Scale Aquaculture Farm Development (use of the amphibious bulldozers).
-
1976
Started the construction of the Awazu Plant General Office of Komatsu Ltd.
-
-
1980
-
1980
Started the construction of the Komatsu Airport Terminal Building.
-
1982
Started construction at Tokyo Disneyland (storm water discharge gate).
-
1983
Started the construction of the new research laboratory and the small press assembly plant of Komatsu.
-
-
1990
-
1990
Started the construction of the Komatsu Electronic Metal Technical Center.
-
1991
Constructed the Rokko Island Plant of Komatsu Ltd.
-
1996
Sediment removal upstream of the Minashigawa No. 1 Sabo Dam was conducted using unmanned construction methods in response to the Mt. Unzen-Fugen eruption disaster.
-
-
2000
-
2000/10
As a result of an M&A transaction, the company’s parent entity changed from Komatsu to Takamatsu Construction (now Takamatsu Construction Group).
With Takamatsu Construction acquired 69.15% of the shares, the company became a part of the Takamatsu Construction Group.
-
-
2001
-
2001/4
This transition led to the establishment of a new management structure within the Takamatsu Construction Group.
-
-
2002
-
2002/7
Capital participation in Aoki Construction (30% investment in September), with Takamatsu Construction’s investing the remaining 70%.
-
2002/10
Formed the corporate group Green Wood Alliance (GWA) with Takamatsu Construction & Aoki Construction.
-
-
2003
-
2003/5
Headquarters relocated to Shiba, Minato-ku, Tokyo.
-
2003/11
Announced merger with Aoki Construction.
-
2003/12
Merger agreement signed.
-
Aoki Construction
-
1940
-
1947/5
Established Bulldozer Construction Co., Ltd.
-
1948
The first private-sector company introduced foreign-made bulldozers.
-
-
1950
-
1956
Developed large sites using heavy machinery (Matsushima Airfield).
-
1957
Awarded the Japan’s first highway, the Yokohama Bypass Road.
-
1958
Imported the first large bulldozer (Caterpillar D9) to Japan.
-
1959
Construction begins on the Hachiro Lagoon land reclamation project.
-
-
1960
-
1961
Constructed the Ayase section of the Shinkansen bullet train route and Takatsuki section of the Meishin Expressway.
-
1962
Started development of copper mine using construction equipment, and expanded into offshore construction.
-
1964/2
Listed on the First Section of the Tokyo Stock Exchange and Osaka Securities Exchange.
-
1965
Began transporting limestone using a high-speed seagoing pusher barge.
-
1966
Awarded large dams (Kisenyama Dam and Okuyama Dam), and introduced computers into dam construction for the first time (Kisenyama Dam).
-
1969
The Company name was changed to Aoki Construction Co.
-
-
1970
-
1971
Full-scale overseas expansion, and construction of the Taiwan Expressway Section 5.
-
1974
Introduced a host computer, implemented a company-wide data communication network, and completed the construction of the Tsugaru Kaikyo Line Seikan Tunnel.
-
1976
Opened the hotel in Brazil.
-
1978
Awarded constructing a thermal power plant in Hong Kong, and constructed a large-volume earth and rock fill exceeding 20,000 m³ per day at the maximum point.
-
1979
Awarded the construction of the rockfill dam in Panama.
-
-
1980
-
1987
First Japanese company to be awarded the contract for the Panama Canal repair works.
-
1988
Acquired the US hotel chain Westin Hotels, the largest M&A in the Japan’s history at that time.
-
-
1990
-
1990
Two large hotels (Swan and Dolphin) opened in Disney World, Florida, USA, and awarded Kisarazu artificial island (now known as Umihotaru).
-
1993
Completed the construction of Shin-Umeda City, and opened Westin Osaka.
-
-
2001
-
2001/12
Made petition for the commencement of civil rehabilitation proceedings under the Civil Rehabilitation Law (September 2002 Termination of proceedings).
-
-
2002
-
2002/7
The existing capital was 100% reduced, and new shares were issued through third-party allotment, setting the capital at 500 million yen. Additionally, convertible bonds with stock acquisition rights totaling 1.5 billion yen were issued, with Takamatsu Construction Co., Ltd. and Komatsu Construction Industry Co., Ltd. as underwriters.
-
-
2003
-
2003/5
Headquarters and Tokyo Head Office relocated to Shiba, Minato-ku, Tokyo.
-
Asunaro Construction (previously known as Komatsu Construction Industry)
Aoki Construction
1940
-
1947/5
Established Bulldozer Construction Co., Ltd.
-
1948
The first private-sector company introduced foreign-made bulldozers.
1950
-
1950/9
Established Fuso Doboku Co., Ltd.
-
1959/6
Established Komatsu Doro Kensetsu Co., Ltd.
(wholly owned by Komatsu Ltd.)
-
1956
Developed large sites using heavy machinery (Matsushima Airfield).
-
1957
Awarded the Japan’s first highway, the Yokohama Bypass Road.
-
1958
Imported the first large bulldozer (Caterpillar D9) to Japan.
-
1959
Construction begins on the Hachiro Lagoon land reclamation project.
1960
-
1960/5
Merged Fuso Doboku Co., Ltd. and Komatsu Doro Kensetsu, and the resulting company was renamed Komatsu Fuso Construction Co., Ltd.
-
1961
Awarded the Koura construction section of the Meishin Expressway.
-
1962/11
The Company name was changed to Komatsu Construction Industry Co., Ltd.
-
1964
Awarded the new construction of the Komatsu buildings and Meishin Expressway Komaki construction zone.
-
1966
Construction began on Komatsu’s Oyama Plant.
-
1967
Construction began on the Awazu and Osaka Plants of Komatsu.
-
1961
Constructed the Ayase section of the Shinkansen bullet train route and Takatsuki section of the Meishin Expressway.
-
1962
Started development of copper mine using construction equipment, and expanded into offshore construction.
-
1964/2
Listed on the First Section of the Tokyo Stock Exchange and Osaka Securities Exchange.
-
1965
Began transporting limestone using a high-speed seagoing pusher barge.
-
1966
Awarded large dams (Kisenyama Dam and Okuyama Dam), and introduced computers into dam construction for the first time (Kisenyama Dam).
-
1969
The Company name was changed to Aoki Construction Co.
1970
-
1970
Executed the first construction project using the amphibious bulldozer (river channel maintenance).
-
1971
Awarded the Higashi Osaka construction section of the Hanshin Expressway.
-
1973/7
Established Komatsu Paving Co., Ltd.
-
1973
Miyagi New Town Development, Nagayo New Town Development Construction, and Large-Scale Aquaculture Farm Development (use of the amphibious bulldozers).
-
1976
Started the construction of the Awazu Plant General Office of Komatsu Ltd.
-
1971
Full-scale overseas expansion, and construction of the Taiwan Expressway Section 5.
-
1974
Introduced a host computer, implemented a company-wide data communication network, and completed the construction of the Tsugaru Kaikyo Line Seikan Tunnel.
-
1976
Opened the hotel in Brazil.
-
1978
Awarded constructing a thermal power plant in Hong Kong, and constructed a large-volume earth and rock fill exceeding 20,000 m³ per day at the maximum point.
-
1979
Awarded the construction of the rockfill dam in Panama.
1980
-
1980
Started the construction of the Komatsu Airport Terminal Building.
-
1982
Started construction at Tokyo Disneyland (storm water discharge gate).
-
1983
Started the construction of the new research laboratory and the small press assembly plant of Komatsu.
-
1987
First Japanese company to be awarded the contract for the Panama Canal repair works.
-
1988
Acquired the US hotel chain Westin Hotels, the largest M&A in the Japan’s history at that time.
1990
-
1990
Started the construction of the Komatsu Electronic Metal Technical Center.
-
1991
Constructed the Rokko Island Plant of Komatsu Ltd.
-
1996
Sediment removal upstream of the Minashigawa No. 1 Sabo Dam was conducted using unmanned construction methods in response to the Mt. Unzen-Fugen eruption disaster.
-
1990
Two large hotels (Swan and Dolphin) opened in Disney World, Florida, USA, and awarded Kisarazu artificial island (now known as Umihotaru).
-
1993
Completed the construction of Shin-Umeda City, and opened Westin Osaka.
2000
-
2000/10
As a result of an M&A transaction, the company’s parent entity changed from Komatsu to Takamatsu Construction (now Takamatsu Construction Group).
With Takamatsu Construction acquired 69.15% of the shares, the company became a part of the Takamatsu Construction Group.
2001
-
2001/4
This transition led to the establishment of a new management structure within the Takamatsu Construction Group.
-
2001/12
Made petition for the commencement of civil rehabilitation proceedings under the Civil Rehabilitation Law (September 2002 Termination of proceedings).
2002
-
2002/7
Capital participation in Aoki Construction (30% investment in September), with Takamatsu Construction’s investing the remaining 70%.
-
2002/10
Formed the corporate group Green Wood Alliance (GWA) with Takamatsu Construction & Aoki Construction.
-
2002/7
The existing capital was 100% reduced, and new shares were issued through third-party allotment, setting the capital at 500 million yen. Additionally, convertible bonds with stock acquisition rights totaling 1.5 billion yen were issued, with Takamatsu Construction Co., Ltd. and Komatsu Construction Industry Co., Ltd. as underwriters.
2003
-
2003/5
Headquarters relocated to Shiba, Minato-ku, Tokyo.
-
2003/11
Announced merger with Aoki Construction.
-
2003/12
Merger agreement signed.
-
2003/5
Headquarters and Tokyo Head Office relocated to Shiba, Minato-ku, Tokyo.
2004
Asunaro Aoki Construction
2004
-
2004/4
Aoki Construction and Asunaro Construction merged to establish Asunaro Aoki Construction.
Appointed Ryoji Ichiki as the president.
2005
-
2005/10
Abolished notes payable.
2006
-
2006/2
Established Daiwa Rock.
-
2006/5
Acquired shares of Toko Construction (now Toko Geotech) and made it a subsidiary.
-
2006/8
Newly established Shareholder Benefit Program.
2007
-
2007/7
Accepted employees and took over construction projects from Nakamura Construction Co., Ltd. (Aichi Prefecture.)
2008
-
2008/9
Acquired shares of Mirai Construction Industry and Mirai Geotech, making them subsidiaries.
Aoki Marine acquired shares in Techno-Marix, and made it a subsidiary (indirect ownership).
2009
-
2009/10
Mirai Construction Industry acquired shares of M’s and made it a subsidiary (indirect ownership).
2010
-
2010/4
Merger of Aoki Marine and Techno-Marix.
-
2010/6
Merger among Toko Construction, Mirai Geotech, and Daiwa Rock, and the resulting company was named Toko Geotech Corporation.
2011
-
2011/6
Established Niigata Mirai Construction.
-
2011/3
Engaged in the restoration and reconstruction works after the Great East Japan Earthquake.
2012
-
2012/3
Headquarters and Tokyo Head Office moved to the TCG Building (Shiba 4-chome, Minato-ku, Tokyo).
-
2012/5
Acquired shares of Shimada Gumi and made it a subsidiary.
2015
-
2015/7
Established the Aoki Asunaro Meister Certification System to certify excellent forepersons and technicians as “Aoki Asunaro Meister.”
2016
-
2016/4
Engaged in the reconstruction and restoration work after the Kumamoto earthquake.
2017
-
2017/11
Obtained the “Kurumin” certification, a next-generation certification for childcare support companies.
2018
-
2018/4
Appointed Yasushi Tsujii as the president.
2019
-
2019/7
Headquarters and Tokyo Head Office relocated (temporarily to Chiyoda-ku, Tokyo, due to the reconstruction of the TCG Building).
-
2019/11
Became a wholly owned subsidiary of Takamatsu Construction Group (Takamatsu CG) and subsequently delisted.
2021
-
2021/3
Transferred all shares in wholly owned subsidiary Niigata Mirai Construction.
2022
-
2022/4
Takamatsu CG implemented the corporate group reorganization.
2023
-
2023/3
Transferred all shares in wholly owned subsidiary Asunaro Road.
-
2023/6
Headquarters and Tokyo Head Office relocated to Minato-ku, Tokyo (following the completion of the Takamatsu CG Tokyo Headquarters Building).
2024
-
2024/2
Conducted trial river excavation work in the Kuma River, Kumamoto Prefecture, primarily using the amphibious bulldozers for recovery from the July 2020 heavy rain disaster.
-
2024/4
Established the Global Human Resources Office to enhance recruitment and development of highly skilled foreign professionals.
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2024/6
Takamatsu CG Tokyo Headquarters Building received the 2024 CFT(Concrete Filled Tube) Structural Award (Japan).
2025
-
2025/1
Science Based Targets Initiative (SBTi) approved the greenhouse gas emission reduction targets.
-
2025/3
Certified as a 2025 KENKO Investment for Health Outstanding Organization (Large Enterprise Category).
-
2025/4
Appointed Naoyuki Mochizuki as the president.
-
2025/4
Sponsored the ‘Future Life Expo: Future City,’ one of the Future Society Showcase Projects at Expo 2025 Osaka, Kansai, Japan, promoted by the Japan Association for the 2025 World Exposition.
Jointly exhibited ‘Underwater Construction of the Future’ with Komatsu (April 13 – October 13, 2025).