Group Companies

Infrastructure Maintenance, Management, and Renovation


KCS Co., Ltd.

+81-3-6240-0581 / Bunkyo-ku, Tokyo, Japan
Regional public transportation planning, MaaS, tourism town planning, tourism content creation, road planning and business evaluation, transportation big data analysis, transportation barrier-free, location optimization planning

Tohoku Boring Co., Ltd.

+81-22-288-0321 / Sendai-shi, Miyagi, Japan
Well construction, well maintenance, design and construction of water treatment facilities, geological and soil surveys

Ocean Engineering Corporation

+81-29-897-3151 / Tsukuba-shi, Ibaraki, Japan
Seafloor topography survey, marine environment survey, marine civil engineering construction management

KOEI Consultant Co., Ltd.

+81-3-5319-3377 / Bunkyo-ku, Tokyo, Japan
City planning, structures design, surveying, and construction management

Nankyu Geo Technics Corporation

+81-99-837-3330 / Kagoshimahi, Kagoshima, Japan
Geological and soil surveys, civil engineering design

OYO Resource Management Co., Ltd.

+81-3-6240-0411 / Bunkyo-ku, Tokyo, Japan
Sales and leasing of office equipment, etc. and management of real estate

OYO Geo-Monitoring Service Corporation

+81-48-285-2133 / Kwaguchi-shi, Saitama, Japan
Rental of measuring instruments, measurement services, sales of impermeable and waterproofing materials

OX, Inc.

Shibuya-ku, Tokyo, Japan
Image-recognition AI business, Planning, designing, developing and selling AI systems, etc.

NihonZitan Co., Ltd.

+81-93-541-1084 / Kitakyushu-shi, Fukuoka, Japan
Magnetic exploration, oceanographic surveys, surveying, geological surveys, environmental surveys / others


Geophysical Survey Systems, Inc.

New Hampshire, U.S.A.
Development, manufacture and sale of underground radar exploration equipment

OYO Corporation, Pacific

Guam, U.S.A.
Geological and soil surveys, civil engineering design

Fong Consult Pte. Ltd.

Civil engineering, construction design, and construction management

FC Inspection Pte. Ltd.

Inspection of infrastructure such as roads and tunnels

Geosmart International Pte. Ltd.

Infrastructure monitoring and installation of monitoring equipment, soil investigation, soil improvement, well condensate treatment

Natural Disaster Prevention and Mitigation


OYO Seismic Instrumentation Corporation

+81-48-866-1228 / Saitama-shi, Saitama, Japan
Sales of seismic observation equipment and earthquake disaster prevention consulting services

OYO RMS Corporation

+81-3-6434-9801 / Bunkyo-ku, Tokyo, Japan
Analysis of natural disaster risk and advisory services


Kinemetrics, Inc.

California, U.S.A.
Development, manufacture, and sale of seismometers, and seismic observation systems



NS Environment Corporation

+81-3-3432-5451 / Minato-ku, Tokyo, Japan
Environmental survey and measurement, environmental hygiene management, asbestos surveys, analysis and countermeasures

Natural Resources and Energy


Geometrics, Inc.

California, U.S.A.
Development, manufacture and sale of seismographs, magnetometers and Geoelectrical instruments

Robertson Geologging LTD.

Development, manufacture and sale of logging equipment



OYO Corporation U.S.A.

California, U.S.A.
North America Regional Headquarters

Equity method affiliates


Engineering and Risk Services Corporation

+81-3-6821-9091 / Chuo-ku, Tokyo, Japan
Building evaluation, soil environment evaluation, and disaster risk evaluation


IRIS Instruments SAS

Development, manufacture and sale of electric exploration equipment