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