History of Asunaro Aoki Construction

1940~2003

Asunaro Construction (previously known as Komatsu Construction Industry)

  • 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.

  • 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).