1. 4 Technology
  2. Technology Development

Foreign Patent

Title Country Patent Number Date of Patent Inventors (Representative)
Method of Purifying Polluted Soil China ZL2006800047389.X Nov.7,2012 ISHIKAWA Yoji
South Korea 101284966 Jul.4,2013
Seawater-mixed Concrete, Concrete Structure Cnstructed with the Same, and Design Method of Concrete Structure Constructed with Seawater-mixed Concrete Taiwan I588115 Jun.21,2017 KANAI Makoto
Gulf Cooperation Council GC0008601 Dec.31,2018
Cement Composition Taiwan I624445 May 21,2018 IRIYA Keishiro
Cement Composition, Method for Producing Mixed Material and Method for Producing Cement Composition Indonesia IDP000059446 Jun.13,2019 IRIYA Keishiro
Water Stop Liquid Mixing Injection System, Water Stop Liquid Mixing Injection Plug, and Water Stop Method for Cement Composition Structure Taiwan I644721 Dec.21,2018 KATAOKA Hiroyasu
Aqueous Emulsion and Water Stop Construction Method Taiwan I677568 Nov.21,2019 KATAOKA Hiroyasu
Bearer United States of America D894645 Sep.1,2020 OHMOTO Eri
  1. Management and
    Organization
    1. The Articles of Incorporation
      1. Current Articles of Incorporation (As of June 24, 2021) Enacted December 19, 1936
    2. Basic Principles
      1. Obayashi Basic Principles Set forth in March 2018
      2. Corporate Messages Created on January 25, 2011
    3. Transitioning of Corporate Symbol
      1. Transitioning to a New Corporate Symbol
    4. Corporate Officers
      1. Founder, Past Chairmen, Presidents, Vice Chairmen and Executive Vice Presidents
      2. Current Officers (As of June 24, 2021)
    5. Organization Chart
      1. Current Organization Chart (As of April 1, 2021)
  2. Stock Information
    1. Total Number of Shares Issued and Outstanding
    2. Status of Shareholding
    3. Major Shareholders
    4. Changes in Stock Price
  3. Financial Statements
    1. Scope of Consolidation
    2. Consolidated Data
  4. Technology
    1. Technology Development
    2. Foreign Patent
  5. BIM Timeline
    1. BIM Timeline外部リンク
  6. Awards
    1. Company Award for Excellent Projects
    2. President's Special Award
  7. Major Publication
    1. Corporate history, biography, etc.
    2. In-house magazines, operational guidelines, etc.
    3. PR magazines
  8. Group Companies
    1. Group Companies (in Japan)
      1. Major Group Companies (in Japan)
        1. OBAYASHI ROAD CORPORATION
        2. NAIGAI TECHNOS CORPORATION
        3. OBAYASHI FACILITIES CORPORATION
        4. OAK SETSUBI CORPORATION
        5. OBAYASHI-SHINSEIWA REAL ESTATE CORPORATION
        6. OAK INFORMATION SYSTEM CO.
      2. Other Group Companies (in Japan)
    2. Group Companies (Overseas)
      1. Major Group Companies (Overseas)
        1. THAI OBAYASHI CORPORATION LIMITED
        2. PT. JAYA OBAYASHI
        3. TAIWAN OBAYASHI CORPORATION
        4. OBAYASHI VIETNAM CORPORATION
        5. OBAYASHI SINGAPORE PRIVATE LTD.
        6. E.W. HOWELL CO., LLC
        7. OBAYASHI USA, LLC
        8. WEBCOR, LP
        9. KENAIDAN GROUP LTD.
        10. JAMES E. ROBERTS-OBAYASHI CORPORATION
        11. KRAEMER NORTH AMERICA, LLC
        12. JS BUILDERS, LLC
      2. Other Group Companies (Overseas)