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

  • 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