Kumagai Gumi Co., Ltd.

Kumagai Group began in January 1918 when Kumagai Mitarō, a stone mason from Fukui, first contracted the waterway construction of the Sufu Power Plant, the third power plant nationwide.

Founding of Kumagai Gumi

Completion of the Sufu Power Plant (started November 1897)

Full operation of the Sanshin Railway (now JR Iida Line)

Establishment of Kumagai Gumi Co., Ltd. (capital 400,000 yen)

Establishment of company rules (revised in 1946, company motto)

Establishment of company regulations

President Kumagai Taizō and Chairman Kumagai Mitarō each assumed office

Tokyo office completely destroyed by air raid

A barrack was set up on the ruins of the Tokyo Kumagai residence and used as an office and dormitory

Fukui City air raid, Kumagai Gumi headquarters completely burned

Nagoya factory (later Toyokawa factory, now TechnoS Co., Ltd.) operations began

Opening of the Technical Research Laboratory (within Tokyo office)

Registered with the Japan Society of Professional Baseball (established baseball club)

Registered with the Basketball Industrial League (established basketball club)

Completion of the new Tokyo office building

First domestic full-section excavation method, monthly record 218.2m, completion of tunnel at Oka Uda Power Plant

First domestic use of roof shield method, completion of Kankō National Highway Shimonoseki-guchi Tunnel

First victory in the 28th Urban Baseball Championship

First championship in the 28th Urban Baseball Tournament (also won the 31st and 37th tournaments)

Champion of the 3rd World Baseball Championship (Detroit)

Through the Kuroshi and Omachi Tunnel

Completion of Japan's first long suspension bridge, Wakado Ohashi

Completion of Nagoya City High-Speed Railway Kakouzan Tunnel, the first use of concrete segment circular shield method in Japan

Completion of the Tokaido Shinkansen Izumigoshi Tunnel, the world's first use of the company's developed silo method

Revision of the company emblem

Completion of the company's first overseas project, Hong Kong Probarco Water Tunnel

Mr. Jinichi Makita becomes president

Completion of the new Ochanomizu Station on the Chiyoda Line, Japan's first eyeglass-shaped shield subway station

Public Offering

Completion of the new headquarters building (current building)

Completion of the Shinjuku Nomura Building, Japan's first single-structure supertall building

Mr. Taichiro Kumagai becomes president

Launch of the New City Higashitotsuka Development Project, one of Japan's largest urban development projects

Completion of the Joetsu Shinkansen Nakayama Tunnel, the first use of NATM in Japan

Completion of the Seikan Tunnel, the world's longest underwater tunnel at the time

Opening of the Tsukuba Technical Research Institute

Opening of the Honshu-Shikoku Link Bridge and Seto Ohashi Bridge (full line)

Completion of the Keiyo Tokushin Line Keibashi Tunnel, the first use of the double-bridge MF shield method in Japan

Completion of Hong Kong's first BOT project, the Hong Kong East Sea Tunnel (EHC)

Hong Kong BOT project: Hong Kong Eastern Seabed Tunnel (EHC) completed

First BOT project in Hong Kong: Hong Kong Eastern Seabed Tunnel (EHC) completed

Japanese construction company led Hong Kong's first BOT project: Hong Kong Eastern Seabed Tunnel (EHC) completed

Completion of the China Bank Hong Kong Branch Building

China Bank Hong Kong Branch Building completed

Basketball team wins first title in the 24th Japan League

Completion of Nara-Mata Dam, Japan's largest rockfill dam

Basketball team wins first title in the 67th All Japan General Championship

Completion of the then Japan's tallest supertall hotel, Makuhari Prince Hotel (now APA Hotel & Resort Tokyo Bay Makuhari)

Establishment of Management Philosophy

Tokyo Bay Cross-Sectional Road Kawasaki Tunnel Floating Island North Passage

Ryōfū Matsumoto appointed president

Celebrated 100th anniversary of founding

Kazutoshi Torikai appointed president

First use of the horizontal triple shield MF shield method worldwide, completion of Iidabashi Station on the Toei Oedo Line

Yokosama-ryo MF shield method used, Tokyo Metropolitan Subway Tozai Line Iidabashi Station completed

First PFI project in Japan, opening of Joetsu City Citizen Plaza

Capital reduction due to loss filling (about 33.4 billion yen → about 3.3 billion yen)

Capital increase through preferred stock issuance (about 3.3 billion yen → about 13.3 billion yen) and corporate split into a new company for real estate and other businesses

Completion of the world's tallest supertall building at the time, "TAIPEI 101"

Hiroshi Ota appointed president

First "Eco-Fast Company" certification in the construction industry

First use of the PSS-Arch method worldwide, completion of the Kanazawa Outer Ring Road and Yuki Tunnel

Completion of the new tunnel method SENS on the Tohoku Shinkansen Mombugahara Tunnel, combining the first NATM method and shield method

First in the construction industry to be certified "Eco‑First Company"

Yasuhiro Higuchi appointed president

Announcement of Kumagai Gumi Group Vision

Participation in the MOM project of the Hong Kong East Submarine Tunnel

Establishment of mascot character "Director Kuma"

Business and capital alliance with Sumitomo Forestry Co., Ltd.

Celebrated 120th anniversary of founding

Sakurano Yasunori appointed as president

Fukui Main Store completed (operations begin September 6)

Completion of Fukui Main Store • Operations begin September 6

Ueda Makoto appointed as president