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March 19, 2025

Notice Concerning Succession of the Villa Site Management Business for the Obayashi Izu-Atagawa Villa Resort Sites to Angel Forest Resorts Co., Ltd. through a Company Split (PDF: 158 KB)

March 6, 2025

Notice Regarding Change of Representative Directors and Officers (PDF: 198 KB)

February 10, 2025

Notice Concerning Establishment of Subsidiary (Sub-subsidiary) by Consolidated Subsidiary of Obayashi Corporation (PDF: 139 KB)

December 23, 2024

Notice Regarding Change of President and Representative Director (PDF: 187 KB)

November 11, 2024

Company Profile

Establish a new data center company, MiTASUN Inc., to develop and operate multiple clusters of the urban data centers

November 11, 2024

Notice Concerning Simplified Absorption-Type Company Split of the Data Center Business into a Subsidiary (PDF: 49 KB)

October 24, 2024

Sustainability

Obayashi Corporation Introduces Alumni Recruitment System

September 30, 2024

Sustainability

Obayashi Corporate Report 2024 is now available

September 26, 2024

Notice Concerning Change in Specified Subsidiary of Obayashi Corporation (PDF: 125 KB)

September 26, 2024

Company Profile

Obayashi Corporate Profile is now available

August 23, 2024

Sustainability

Posted Statement on Modern Slavery and Human Trafficking (FY2023) (PDF: 474.8 KB)

July 19, 2024

Company Profile

Obayashi Corporation Establishes Obayashi Construction-Tech Lab Singapore, an Overseas R&D Base in Singapore

July 5, 2024

Company Profile

Commemorative Certificate for Capital Tie-up Signed with Eastland Generation in the Presence of New Zealand Prime Minister Luxon

June 27, 2024

Notice of Resolutions of the 120th Ordinary General Meeting of Shareholders (PDF: 91.9 KB)

May 13, 2024

Notice Concerning Addendum to Obayashi Group Medium-Term Business Plan 2022 (PDF: 849.6 KB)

May 9, 2024

Company Profile

Obayashi granted OIO for 50% shares in Eastland Generation

March 27, 2024

Notice Regarding Change of Representative Directors and Officers (PDF: 191.3 KB)

November 13, 2023

Company Profile

Acquisition of Shares of Eastland Generation Limited (PDF: 121.4 KB)

November 6, 2023

Company Profile

Acquisition of Shares of MWH US Acquisitions, Inc. (PDF: 163.1 KB)

September 27, 2023

Company Profile

Obayashi Corporate Profile is now available

August 22, 2023

Sustainability

Posted Statement on Modern Slavery and Human Trafficking (FY2022) (PDF: 712.7 KB)

August 9, 2023

Company Profile

Obayashi Corporation to Establish Procurement Division

June 28, 2023

Notice of Resolutions of the 119th Ordinary General Meeting of Shareholders (PDF: 93.6 KB)

March 30, 2023

Notice Regarding Change of Audit & Supervisory Board Members (PDF: 122.1 KB)

March 28, 2023

Notice Regarding Change of Representative Directors and Officers (PDF: 231.0 KB)

September 30, 2022

Sustainability

Obayashi Corporate Report 2022 is now available (PDF: 10.9 MB)

September 15, 2022

Company Profile

Obayashi Corporate Profile is now available (PDF: 2.8 MB)

August 26, 2022

Sustainability

Posted Statement on Modern Slavery and Human Trafficking (FY2022.3) (PDF: 438.7 KB)

June 23, 2022

Notice of Resolutions of the 118th Ordinary General Meeting of Shareholders (PDF: 267.3 KB)

March 29, 2022

Notice Regarding Change of Representative Director and Officers (PDF: 231.8 KB)

March 11, 2022

Formulation of Obayashi Group Medium-Term Business Plan 2022

December 20, 2021

Company Profile

Obayashi Corporation's 130-year history, "Obayashi Chronicle 130 1892-2021" has been released

October 1, 2021

Company Profile

Obayashi Corporate Profile is now available (PDF: 2.8 MB)

September 29, 2021

Sustainability

Obayashi Corporate Report 2021 is now available (PDF: 10.9 MB)

September 2, 2021

Sustainability

Posted Statement on Modern Slavery and Human Trafficking (FY2021.3) (PDF: 411.9 KB)

July 26, 2021

Company Profile

The Obayashi Group has formulated tax governance policy

June 24, 2021

Notice of Resolutions of the 117th Ordinary General Meeting of Shareholders (PDF: 102.7 KB)

March 30, 2021

Notice Regarding Change of Representative Director and Officers (PDF: 177.8 KB)

January 18, 2021

Company Profile

Regarding Cease and Desist Order and Surcharge Payment Order Received from Japan Fair Trade Commission (PDF: 14.0 KB)

October 30, 2020

Company Profile

Concerning lawsuit over property constructed by Obayashi's US subsidiary Webcor

September 18, 2020

Sustainability

Obayashi Corporate Report 2020 is now available (PDF:9.8 MB)

July 14, 2020

Sustainability

Posted Statement on Modern Slavery and Human Trafficking (FY2020.3) (PDF:1.9 MB)

June 24, 2020

Notice of Resolutions of the 116th Ordinary General Meeting of Shareholders (PDF:100.0 KB)

May 27, 2020

Company Profile

Response to Ending of the Declaration of State of Emergency

April 9, 2020

Company Profile

Response to Declaration of a State of Emergency under the COVID-19 Special Law

March 27, 2020

Company Profile

Implementation of telecommuting at the Head Office, Tokyo Main Office, Yokohama Branch, and Kanto Branch

October 10, 2019

Sustainability

Obayashi Corporate Report 2019 is now available (PDF:7.9 MB)

August 6, 2019

Company Profile

Regarding Cease and Desist Orders and Surcharge Payment Orders Received from the Japan Fair Trade Commission Concerning a Subsidiary (Obayashi Road Corporation) (PDF:70.0 KB)

July 30, 2019

Sustainability

Posted Slavery and Human Trafficking Statement in accordance with the UK Modern Slavery Act 2015 (PDF:191.7 KB)

July 12, 2019

Sustainability

Obayashi Corporation has issued a sustainability bond

June 25, 2019

Notice of Resolutions of the 115th Ordinary General Meeting of Shareholders (PDF:16.7 KB)

January 28, 2019

Company Profile

Regarding a Suspension of Business Penalty in Accordance with the Construction Business Act(PDF:62.9KB)

November 1, 2018

Sustainability

Obayashi Corporation has issued a green bond

October 26, 2018

Company Profile

Regarding a Judgment on a violation of the Antimonopoly Act(PDF:70.8KB)

September 19, 2018

Sustainability

Obayashi Corporate Report 2018 is now available(PDF:7.2MB)

September 10, 2018

Company Profile

Notice Regarding the Establishment of a Third-party Committee(PDF:67.8KB)

June 26, 2018

Notice of Resolutions of the 114th Ordinary General Meeting of Shareholders (PDF:17KB)

February 20, 2018

Notice Regarding Change of Representative Director and Officers(PDF:143.2KB)

January 24, 2018

Notice Regarding Change of President and Transfer of Representative Director(PDF:113KB)

October 20, 2017

Obayashi Corporate Report 2017 is now available(PDF:10,260KB)

June 29, 2017

Notice of Resolutions of the 113th Ordinary General Meeting of Shareholders (PDF:91KB)

June 22, 2017

Notice Regarding Results of Tender Offer for Shares of Obayashi Road Corporation (Securities Code: 1896)(PDF:199KB)

May 30, 2017

Notice of Convocation of the 113th Ordinary General Meeting of Shareholders (PDF:618KB)

May 10, 2017

Notice Regarding Commencement of Tender Offer for Shares of Obayashi Road Corporation (Securities Code: 1896)(PDF:632KB)

March 24, 2017

Announcement of Revisions for the Financial and Dividends Forecasts as well as the Formulation of the Medium-Term Business Plan (PDF:90KB)

October 26, 2016

Obayashi Corporate Report 2016 is now available(PDF:11,448KB)

June 29, 2016

Notice of Resolutions of the 112th Ordinary General Meeting of Shareholders (PDF:92KB)

May 31, 2016

Notice of Convocation of the 112th Ordinary General Meeting of Shareholders (PDF:164KB)

October 21, 2015

Obayashi Corporate Report 2015 is now available(PDF:13,502KB)

June 26, 2015

Notice of Resolutions of the 111th Ordinary General Meeting of Shareholders (PDF:89KB)

May 29, 2015

Notice of Convocation of the 111th Ordinary General Meeting of Shareholders (PDF:249KB)

April 14, 2015

Announcement of the Revisions for the Financial and Dividends Forecasts as well as the Formulation of the Medium-Term Business Plan (PDF:55KB)

March 2, 2015

The Announcement of Acquiring Ownership of Kraemer North America, LLC, General Contractor in U.S.A.

October 9, 2014

OBAYASHI Corporate Report 2014 (Financial, Social and Environmental Performance) is now available(PDF:6,192KB)

June 27, 2014

Notice of Resolutions of the 110th Ordinary General Meeting of Shareholders

June 3, 2014

Notice of Convocation of the 110th Ordinary General Meeting of Shareholders

September 30, 2013

OBAYASHI Corporate Report 2013 (Financial, Social and Environmental Performance) is now available(PDF:5,640KB)

June 27, 2013

Notice of Resolutions of the 109th Ordinary General Meeting of Shareholders (PDF:85KB)

June 3, 2013

Notice of Convocation of the 109th Ordinary General Meeting of Shareholders (PDF:182KB)

October 3, 2012

OBAYASHI Corporate Report 2012 (Financial, Social and Environmental Performance) is now available(PDF:6,992KB)

June 28, 2012

Notice of Resolutions of the 108th Ordinary General Meeting of Shareholders

June 4, 2012

Notice of Convocation of the 108th Ordinary General Meeting of Shareholders (PDF:125KB)

March 6, 2012

Obayashi announced "Obayashi Group Medium Term Business Plan 2012"

September 30, 2011

Sustainability

CSR Report 2011 is now available.

June 28, 2011

Notice of Resolutions of the 107th Ordinary General Meeting of Shareholders (PDF:81KB)

June 3, 2011

Notice of Convocation of the 107th Ordinary General Meeting of Shareholders (PDF:125KB)

April 12, 2011

Changes in Corporate Auditors

March 25, 2011

Announcement on acquisition of shares in Seiwa Real Estate

March 8, 2011

Announcement on acquisition of shares in Kenaidan, a Canadian general contracting company

March 4, 2011

Changes in Representative Directors, Directors and Executive Officers

September 30, 2010

Sustainability

CSR Report 2010 is now available.

June 25, 2010

Notice of Resolutions of the 106th Ordinary General Meeting of Shareholders (PDF:18KB)

June 3, 2010

Notice of Convocation of the 106th Ordinary General Meeting of Shareholders (PDF:132KB)

June 3, 2009

Notice of Convocation of the 105th Ordinary General Meeting of Shareholders