From1981Challenges that Led to Growth

Kumagai Gumi's overseas business, which started in Hong Kong, spread around the world to Taiwan and Southeast Asia as well as North America, Australia, and Europe among other areas. The company also participated in many representative large projects in Japan. In 1985 the order amount for Kumagai Gumi exceeded 1 trillion yen, and that year the ordinary income was 32.6 billion yen; No.1 in the construction industry.
During the second half of the 1990s, however, Kumagai Gumi gradually began to be impacted by the burst of the Bubble Economy.

1981

September
Began the New City Higashi-Totsuka; the largest urban development project in Japan
December
Construction completed of the Joetsu Shinkansen Nakayama Tunnel using NATM for the first time in Japan

1985

March
The Seikan Tunnel, the longest undersea tunnel in the world at the time opens

1988

March
The Institute of Construction Technology opens in Tsukuba
April
The Seto Ohashi Bridge (Onaruto Bridge) connecting Honshu and Shikoku opens
October
The Keiyo Toshin Line Kyobashi Tunnel opens. This tunnel used the horizontal twin MF type muddy water shield method for the first time in Japan.

1989

September
Construction completed of the undersea Hong Kong Eastern Harbour Crossing (EHC) Tunnel, the first BOT project in Hong Kong in which a Japanese construction company was involved

1990

May
Construction completed of the Bank of China Hong Kong Branch Building

1991

March
Basketball Team wins the Emperor's Cup and Empress's Cup Basketball 1992
(Also wins the Emperor's Cup and Empress's Cup Basketball 1994)
June
Completed construction of the Naramata Dam, the largest rock fill dam in Japan

1992

January
Basketball Team wins the 67th National Japanese Basketball Championship

1993

March
Construction completed of the Makuhari Prince Hotel (currently APA Hotels & Resorts, Tokyo Bay Makuhari), the tallest super high-rise hotel in Japan
October
Management Philosophy established

1997

April
Trans-Tokyo Bay Highway Kawasaki Tunnel Ukishima-kita opens
November
Yoshio Matsumoto appointed as president

1998

January
100-year anniversary since founding

2000

December
Kazutoshi Torikai appointed as president
December
Construction completed of the Toei Subway Oedo Line Iidabashi Station using the horizontal triple type MF shield method for the first time in the world