Company Information


To our valued customers

This is to advise that the Geophysical Surveying Co. Ltd. homepage has been renewed. The services we provide have been explained in an easy-to-understand manner, and we hope that this will be useful in enlisting our services.

Founded in 1976, Geophysical Surveying has been providing logging and consulting services for oil and gas wells, geothermal wells and hot spring wells for over 40 years. In 1989, we introduced a mud logging system and started to provide drilling monitoring services for oil and gas wells. In 1994, we acquired the slick line service division from our parent company in order to fortify our borehole operations. Since then, we have aggressively introduced cutting edge equipment such as high temperature borehole televiewers, next generation resistivity imaging tools, and dipole acoustic logging tools to meet customer demand.

We would also like to note that to address the needs of today, when the preservation of the global environmental is a must, our measurement technology is being applied in the development of renewable energy such as geothermal energy as well as carbon dioxide capture and storage (CCS), considered a key technology in mitigating global warming. Our high temperature, corrosion resistant equipment can provide reliable data in harsh environments including geothermal and CCS wells. In addition, we are able to support our customers' safe and sustainable businesses with the latest monitoring services such as fiber optic sensing and IoT.

We will continue to introduce, develop and provide new technologies while maintaining a superior standard of trust and quality, in order to meet the changing needs of our times and to support the development of energy resources and the effective use of underground space. Kenji Kaneko
Geophysical Surveying Co., Ltd.


Name of the Company
Geophysical Surveying Co., Ltd (GSC)
October 23, 1976
Main Office
Ehara Bldg.2F, 1-5-7 Kaji-Cho Chiyoda-Ku, TOKYO 101-0044 JAPAN
PHONE: +81-3-5294-6711 FAX: +81-3-5294-6718
Nagaoka Branch
2-4-14 Nishiaramachi Nagaoka-Shi, NIGATA 940-0024 JAPAN
PHONE: +81-258-36-5021 FAX: +81-258-34-0343
JPY 446 million
Representative Director
Kenji Kaneko, President
Number of Employees
64 as of June 25, 2021
Wireline Logging Services (Geophysical Logging, Borehole Imaging Logging, Cased Hole Logging, Tectonic Stress Measuring, etc)
Casing Hole Services (Perforating, Back-Off Services, Bridge Plug and Packer Services, etc)
Mud Logging Services (Drilling Parameter, Mud Parameter, Mud Gas Services)
Slickline Services (Slickline Measuring, Slickline Casing Inspection and Slickline Packer Services, etc)
Consultants and Log Interpretation
Development and Customization
Maintenance and Repairs