Corporate Profile

Basic Information

Company name OYO Corporation
Address Sumitomo Fudosan Kanda Building 9th Floor, 7 Kanda Mitoshiro-cho, Chiyoda-ku, Tokyo, 101-8486, Japan
List of Offices
Phone +81-3-5577-4501
Establishment May 2, 1957
Capital JPY 16,174.6 million
Stock Listing Tokyo Stock Exchange Prime Market
Number of employees 2,438 (consolidated), 1,209 (non-consolidated) (As of December 31, 2022)
Main Business
  • A series of technical operations ranging from ground investigation associated with roads and city planning, construction of civil engineering structures and building structures, etc., to design and construction management.
  • Technical operations such as survey on landslides, cliff collapses, earthquake disasters, and storm and flood damage. Technical operations such as analyses, predictions, diagnoses, evaluations and countermeasures of natural disaster risk.
  • Technical operations such as surveys, analyses, predictions, diagnoses, evaluations and countermeasures of environmental conservation and risks.
  • Collection, processing, and sales of earth-related information such as ground, environment, and disaster information.
    Development, manufacture, sales, leasing, and rental of various measuring instruments, security instruments, software, and systems.
Business Registration
  • Consulting Engineer (No. 01-175, registered with the Ministry of Land, Infrastructure, Transport and Tourism)
    • River, Erosion Control and Coasts / Oceans; Ports and Airports; Roads
    • Water supply and Industrial Water supply; Sewers; Agricultural Civil Engineering
    • Forest Civil Engineering; Waste; Urban Planning and Rural Planning
    • Geology; Soil and Foundations
    • Steel Structure and Concrete
    • Tunnels; Construction Environments; Electrical & Electronics Engineering
  • Geological Surveyor (No. 04-12, registered with the Ministry of Land, Infrastructure, Transport and Tourism)
  • Measurement Certification Business (registered)
    • Concentration (No. 555, registered with the government office of Saitama Prefecture)
  • Certified Survey Firm (No.(14)-1334, registered with the Ministry of Land, Infrastructure, Transport and Tourism)
  • Special Construction Contractor ((TOKU-4) No. 2181, licensed by Ministry of Land, Infrastructure, Transport and Tourism)
  • 1st-class Registered Architect Office (No.(3) 10113, registered with the government office of Saitama Prefecture)
  • Designated Investigation Firm (pursuant to the Soil Contamination Countermeasures Act)
    • Social Contamination Designated Investigation Firm (registered with the Ministry of the Environment, No. (Kan) 2003-8-2047)
Certified ISO management systems
  • Quality management system (ISO9001:2015)

    Applicable Office : All offices

    Scope of Activities :

    1. Soil investigation, construction consultant, civil design, and information system
    2. Design, development, manufacturing and the accompanying services (equipment repair) of the following equipment
      • Seismic exploration equipment
      • Electric exploration equipment
      • Physical logging equipment
      • In-situ testing equipment
      • Ground surface monitoring equipment
      • Crime prevention security equipment
      • Ocean exploration equipment
      • Ground penetrating radar
      • magnetic exploration equipment
      • Gravity exploration equipment

    Registration Number : JQA-2772

    Registration Date : November 13, 1998

    Expiration Date : December 19, 2026

  • Testing and Calibration Laboratories (ISO/IEC 17025:2017)

    Applicable Office : Core Laboratory Experiment Center

    Scope of Certification :

    1. Test Method for Water Content of Soils (JIS A 1203)
    2. Test Method for Bulk Density of Soils (JIS A 1225)
    3. Method for Cyclic Undrained Triaxial Test on Soils (JGS 0541)
    4. Method for Cyclic Triaxial Test to Determine Deformation Properties of Geomaterials (JGS 0542)
    5. Method for Cyclic Triaxial Test to Determine Deformation Properties of Soft Rocks (JGS 2563)
    6. Standard Test Method for Consolidated Undrained Direct Simple Shear Testing of Fine Grain Soils (ASTM D6528)

    Registration Number : RTL05190

    Registration Date : September 17, 2024

    Expiration Date : September 30, 2028

  • Environmental Management System (ISO14001:2015)

    Applicable Office : All offices

    Scope of Activities : Same as ISO9001

    Registration Number : JQA-EM6855

    Registration Date : July 6, 2012 (Initial registration on January 1, 2003)

    Expiration Date : December 31, 2026

  • Information Security Management System (ISO/IEC 27001:2013)

    Applicable Office : All offices

    Scope of Activities : Same as ISO9001

    Registration Number : JQA-IM1238

    Registration Date:March 14, 2014

    Expiration Date : December 31, 2025

  • Personal Information Protection Management System (JIS Q 15001:2017)

    Registered office : Information Systems Division

    Scope of registered activities :

    1. Business related to geological surveys, construction consultants, civil engineering design, disaster prevention and mitigation, information systems
    2. Software development and sales related to the Company's overall business

    Registration number : JQA-KP0022

    Registration date : November 27, 2020

    Expiration Date : December 31, 2025

  • Occupational Safety and Health Management System (ISO 45001:2018)

    Registered office : Energy Business Division

    Scope of registered activities : Offshore wind farm business by the Energy Business Division

    Registration number : OHS 811101

    Registration date : September 29, 2024

    Expiration Date : September 28, 2027