Group Companies


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
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
NihonZitan Co., Ltd. +81-93-541-1084 / Kitakyushu-shi, Fukuoka, Japan
Magnetic exploration, oceanographic surveys, surveying, geological surveys, environmental surveys / others
NS Environment Corporation +81-3-3432-5451 / Minato-ku, Tokyo, Japan
Environmental survey and measurement, environmental hygiene management, asbestos surveys, analysis and countermeasures
Ocean Engineering Corporation +81-29-897-3151 / Tsukuba-shi, Ibaraki, Japan
Seafloor topography survey, marine environment survey, marine civil engineering construction management
OX, Inc. Shibuya-ku, Tokyo, Japan
Image-recognition AI business, Planning, designing, developing and selling AI systems, etc.
OYO Geo-Monitoring Service Corporation +81-48-285-2133 / Kawaguchi-shi, Saitama, Japan
Rental of measuring instruments, measurement services, sales of impermeable and waterproofing materials
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 Seismic Instrumentation Corporation +81-48-866-1228 / Saitama-shi, Saitama, Japan
Sales of seismic observation equipment and earthquake disaster prevention consulting services
Sanyo Techno Marine +81-3-3666-3417 / Chuo-ku, Tokyo, Japan
Surveying, geological surveys, environmental surveys, Environmental Consultant, Construction Consultant, Fisheries Consultant
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

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


OYO Corporation U.S.A. California, U.S.A.
Geometrics, Inc. California, U.S.A.
Development, manufacture and sale of seismographs, magnetometers and Geoelectrical instruments
Geophysical Survey Systems, Inc. New Hampshire, U.S.A.
Development, manufacture and sale of underground radar exploration equipment
Kinemetrics, Inc. California, U.S.A.
Development, manufacture, and sale of seismometers, and seismic observation systems
Robertson Geologging LTD. U.K.
Development, manufacture and sale of logging equipment
OYO Corporation, Pacific Guam, U.S.A.
Geological and soil surveys, civil engineering design
Fong Consult Pte. Ltd. Singapore
Civil engineering, construction design, and construction management
FC Inspection Pte. Ltd. Singapore
Inspection of infrastructure such as roads and tunnels
Geosmart International Pte. Ltd. Singapore
Infrastructure monitoring and installation of monitoring equipment, soil investigation, soil improvement, well condensate treatment

Equity method affiliates

IRIS Instruments SAS France
Development, manufacture and sale of electric exploration equipment