Obayashi Corporation

Order received for Abe Paper Factory

Obayashi Yoshifurō founded civil engineering contracting business "Obayashi Store" in Nishikita Nakanomichi (now Nishikichō 2-chōme), Osaka City (January 25)

Named the store "Obayashi Group" and opened Tokyo office

Moved headquarters to Kita-hamamachi 2-chōme, Higashiyama-ku, Osaka City (now Chūō-ku)

Upgraded Tokyo office to branch

Order received for the Railway Institute Tokyo Central Station (now Tokyo Station) (completed in 1914)

Contracted Osaka Electric Railway Ikoma tunnel and nearby tracks (completed 1924)

Death of shop owner Yoshifugoro Obayashi. Succession of company affairs by Yoshio Obayashi

Establishment of Obayashi Corporation

Newly built and moved headquarters to Kyōbashi 6-chōme, Higashiyama-ku, Osaka City (now Chūō-ku)

Completion of Osaka Mainichi Shimbun Headquarters and Osaka Merchant Shipping Kobe Branch

Participated in reconstruction and recovery work for the Great Kanto Earthquake, including Maru Building renovation

Completion of Hanshin Electric Railway Koshien Stadium and Meiji Jingu Gaien Stadium

Established Yokohama branch (promoted from traveling office)

Established Nagoya branch (promoted from traveling office)

Completion of the new headquarters building

Order for Osaka Metro Yodoyabashi–Kita-Kutaro section (completed in 1932)

Order for Osaka Castle keep (completed in 1931)

Establishment of Daini Araki Group Co., Ltd.

Merged with Second Obayashi Group and Obayashi Group, changing the company name to Obayashi Group Co., Ltd.

Established Hiroshima branch (promoted from sales office)

President Yoshio Obayashi passed away. Chairman Kazuo Shiraguchi, President Yoshio Obayashi, and Vice President Toriyasu Nakamura were appointed.

Set up Sendai branch (promoted from a branch office, renamed Tohoku branch in 1987).

Set up Sapporo branch (promoted from a branch office).

Established a research department at the headquarters.

Completed the first registration under the Construction Business Act (Construction Minister).

Commenced construction of the Kakuhei Dam to meet postwar electricity demand.

Listed on the Osaka Stock Exchange.

Listed on the Tokyo Stock Exchange.

Set up Kobe branch (promoted from a branch office).

Built and opened a technology research institute in Kiyose City, Tokyo.

Completed Yokohama Dreamland Hotel Empire, Japan's first supertall building.

Completed the Mushi Bridge in Indonesia, marking a major overseas expansion.

Closed the Tokyo branch and established the Tokyo headquarters.

Hosted the Japan World Exposition, developing major facilities such as the festival square.

Completed Osaka Obayashi Building, the first supertall building in western Japan.

Established Kanazawa branch (renamed Hokuriku branch in 1979, moved to Niigata City in 1991).

First Japanese construction company to win a U.S. public works contract (San Francisco sewer project).

Established an engineering headquarters at the Tokyo headquarters.

Chairman Yoshio Obayashi, President Takao Tsumura appointed.

Established corporate philosophy, management posture, and code of conduct. Created a new corporate emblem.

Establishment of the Earth Environment Department

100th anniversary of founding

Long-term management vision "Obayashi Renaissance 111" established

Opening of Kansai International Airport

Hanshin-Awaji Great Earthquake. Engaged in restoration and reconstruction works

Tokyo headquarters and main office construction division obtained ISO 9001 certification for quality assurance (by 1998, all stores in construction, civil engineering, engineering, and nuclear departments achieved certification)

Shinji Mukasa appointed as president

Tokyo International Forum, Osaka Dome, and Kyoto Station Building completed

Tokyo Bay Aqua-Line opened

Akashi Kaikyo Bridge opened. Shinagawa Intercity completed

Tokyo headquarters moved to Shinagawa Intercity

Stadium Australia (Olympic main stadium) completed

ISO14001 certification achieved across all stores and organizations

PFI project awarded to Kanagawa Prefectural Health and Welfare University

Completion of Dentsu Head Office Building and Marunouchi Building

Achievement of Zero Emissions at Construction Site

Kobe Wing Stadium completed

Opened the Obayashi History Museum to commemorate 110 years of founding

Completion of Roppongi Hills Mori Tower

Formulation of the "Excellent Company Concept"

Goro Obayashi Assumes Chairmanship

Death of honorary chairman Yoshio Obayashi

Opening of Shinagawa Station on the Tokaido Shinkansen

Zero emissions achieved at construction sites

Niigata Prefecture Nakadake Earthquake: Involved in Recovery and Reconstruction Works

Opening of Shinagawa Station on the Tokaido Shinkansen

Love Earth Expo (Aichi Expo): Designed Major Pavilion

Completion of the Kyoto Guest House

Norio Wakimura Assumes Presidency

Involved in restoration and reconstruction work after the Niigata Prefecture Naka-jo earthquake

Completion of Omotesando Hills

Hosted the Aichi Expo (Love Earth Expo), designing major pavilions

Completion of Kyoto Guest House

Norio Wakimura appointed as president

Opening of the Taiwan Shinkansen

Tatsuya Shiraishi Assumes Presidency

Omotesando Hills completed

Initiated "Mid-Term Management Plan '08"

Established Overseas Branch

Commenced Construction of Tokyo Skytree

Opening of the Taiwan Shinkansen

Tatsuya Shiraishi appointed as president

Groundbreaking of the new main building of the Technical Research Institute

Tokyo Skytree construction started

Reorganized Tokyo Headquarters as Main Office and Tokyo Main Store

Renamed Main Store to Osaka Main Store

Tech Research Institute New Main Building Techno Station Completed

Groundbreaking of the new main building of the Technology Research Institute

120th anniversary of founding

Obayashi Corporation Establishes Core Philosophy and Corporate Message

Great East Japan Earthquake. Engaged in Restoration and Reconstruction Works

Reorganized headquarters and Tokyo branch into headquarters and Tokyo main office

Renamed main office to Osaka main office

Completed new main building of Technology Research Institute, Techno Station

Tokyo Skytree Completion

Formulated "Mid-Term Management Plan '12"

Commenced Renewable Energy Business

East Japan earthquake. Engaged in recovery and reconstruction work

Grand Front Osaka Completion

Moved Osaka Headquarters to Dai-Building Main Hall

Toranomon Hills Completion

Tech Research Institute Open Lab 2 Completion

Established New Department for Tech Business Creation

Formulated "Obayashi Group Mid-Term Management Plan 2015"

Started Construction of Shinagawa Station (South Engineering District) for the Linear Central Shinkansen

Kumamoto Earthquake. Engaged in Restoration and Reconstruction Works

JR Shinjuku Miraina Tower Completion

Held Techno Fair to commemorate 125th Anniversary of Founding and 50th Anniversary of Tech Research Institute

Commenced construction of Shinagawa Station (South Engineering District) for the Linear Chuo Shinkansen

Formulated "Obayashi Group Mid-Term Management Plan 2017"

Akasaka Intercity AIR Completion

Kumamoto earthquake. Engaged in recovery and reconstruction work

Completion of JR Shinjuku Miraina Tower

Held Techno Fair to commemorate 125 years of founding and 50 years of technology research

Kenji Renwa Appointed as President

New Zealand Waterview Connection Tunnel Completion

Completion of Akasaka Intercity AIR

Discontinued overseas branches and established Asian and North American branches

Renamed the machine factory to Robotics Center

Completion of New Zealand Waterview Connection Tunnel

Established the Sales Headquarters and Kanto Branch

Established the Brand Vision

Developed the Corporate Transformation Program

Closed overseas branch and established Asian and North American branches

Renamed machine factory to Robotics Center

130th anniversary of founding

Completion of the Kumamoto Castle keep

Established the Green Energy Headquarters

Established new sales headquarters and Kanto branch

Established brand vision

Formulated corporate transformation program

Established the DX Headquarters

Developed the "Obayashi Group Mid-Term Management Plan 2022"

Completion of Port Plus® Obayashi Group Yokohama Training Center

Established Green Energy Headquarters

Capital partnership with timber manufacturing and sales company Cypress Snadaya

Established the Procurement Headquarters

Acquired U.S. construction company "MWH Co." as a subsidiary

Completion of Escon Field HOKKAIDO

Obtained ZEB certification as the first temporary site office in Japan

Completion of Port Plus® Araki Group Yokohama Training Center

Completion of Escon Field HOKKAIDO

Capital partnership with timber manufacturing and sales company Cypress Snadaya

Obayashi Group Sendai Umeda Dormitory completed

Kawakami Dam completed

Completion of Obayashi Corporation Sendai Umeda Dormitory

Completion of Kawakami Dam

3D printer demonstration building "3dpod™" finished

Released "Robotics Construction" content

SEP completed for offshore wind farm construction

Released "Robotics Construction" content

Azabudai Hills Garden Plaza completed

Completion of Azabudai Hills Garden Plaza

New procurement headquarters established

Acquisition of U.S. construction company "MWH" as a subsidiary

Acquired shares of New Zealand renewable energy company "Eastland Generation"

Completion of Yokohama Symphony Stage

Announced "Obayashi Group Mid-Term Management Plan 2022 Supplement"

Established new company MiTASUN (Mitasun) for urban data centers

Capital partnership with wood manufacturing and sales company Cypress Snadaya

Established procurement headquarters

Acquired U.S. construction company MWH as a subsidiary

Shun Sato appointed as president

Hosted the 2025 Japan International Expo, building pavilions and venue facilities including the large roof ring

Acquired U.S. construction company "GCON Co." as a subsidiary

Completion of Yokohama Symphony Stage

Announcement of "Obayashi Group Mid-Term Management Plan 2022 Supplement"

Established new company MiTASUN (MiTASUN) for urban data centers