| 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 |
2,703 (consolidated), 1,265 (non-consolidated) (As of December 31, 2025) |
| 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.(4) 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) 2003-8-3004)
|
| Certified ISO Management System |
-
Quality Management System (JIS Q 9001:2025 (ISO 9001:2015+Amd 1:2024))
Registration Scope :
- Investigation and inspection (Geological survey, physical survey, ecological survey, laboratory test, structural inspection, etc.)
- Construction consultant (Reconstruction plans, maintenance plans, damage estimates, environmental assessments, etc.)
- Civil engineering design (Slope design, civil engineering structure design, etc.)
- Information consultant (Development of monitoring systems, civil engineering software, land information services, etc.)
- Design, development, manufacture, and sales of measuring instruments and related services (equipment repair)
- Seismic survey instruments
- Electric survey instruments
- Physical logging instruments
- In-situ testing instruments
- Ground monitoring instruments
- Marine survey instruments
- Sales of measuring instruments and related services (equipment repair)
- Security surveillance instruments
- Underground radar survey instruments
- Magnetic survey instruments
- Gravity survey instruments
Registration Number : JMAQA-2814
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 :
- Test Method for Water Content of Soils (JIS A 1203)
- Test Method for Bulk Density of Soils (JIS A 1225)
- Method for Cyclic Undrained Triaxial Test on Soils (JGS 0541)
- Method for Cyclic Triaxial Test to Determine Deformation Properties of Geomaterials (JGS 0542)
- Method for Cyclic Triaxial Test to Determine Deformation Properties of Soft Rocks (JGS 2563)
- 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 (JIS Q 14001:2025 (ISO 14001:2015+Amd 1:2024))
Applicable Office : Same as Quality Management System
Scope of Activities : Same as Quality Management System
Registration Number : JMAQA-E1009
Registration Date : July 6, 2012 (Initial registration on January 1, 2003)
Expiration Date : December 31, 2026
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Information Security Management System (JIS Q 27001:2025 (ISO/IEC 27001:2022+Amd 1:2024))
Applicable Office : Same as Quality Management System
Scope of Activities : Same as Quality Management System
Registration Number : JMAQA-S262
Registration Date:March 14, 2014
Expiration Date : December 31, 2028
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Personal Information Protection Management System (JIS Q 15001:2023)
Registered office : Information Systems Division
Scope of registered activities :Business related to geological surveys, construction consultants, civil engineering design, disaster prevention and mitigation, information systems
Registration number : JMAQA-P001
Registration date : November 27, 2020
Expiration Date : December 31, 2028
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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
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Japanese
