Head office



Kenichi Watanabe


March, 1988


10 million yen


Water Leak Detectors, Measuring & Testing devices for telecommunication and power line, Cable Locators, Battery Powered Hydraulic Tools


2-3-3 Musuura-higashi Kanazawaku, Yokohama, Kanagawa, 2360037 Japan


+81-(0)45-701- 5680



Company History

March, 1988

ounded in Kamakura by Kenichi Watanabe, as an import company handling irrigation equipment such as sprinklers, valves and controllers for Golf courses.

June, 1988

Not only importing and selling goods but we also started construction work of irrigation systems at Golf courses including plumbing work, pumping system and wiring installation and control system. Started business with PROGRESSIVE ELECTRONICS in U.S.A. and became sole distributor for its cable locators and testing devices.

May, 1999

Became sole distributor in Japan for GREENLEE TEXTRON Inc., U.S.A., and started the import and sales of its tools and testing devices.

May, 2001

Started import business of Tone&Probes and testing devices for a telecommunication field.

October, 2002

Started business with TEST-UM and Psiber, U.S.A. , handling LAN testers

April, 2005

Concluded a sales contract for battery powered hydraulic tools and became an Authorized Service Center of Gustav Klauke GmbH, Germany.


Became sole distributor of Tasco Inc., U.S.A., and started sales of their cable locators. Cooperated together for product innovation.

August, 2008

Moved headquarter to Mutsuura-higashi, Kanazawa-ward, Yokohama, Japan.

April, 2009

Started business of water leak detectors and became sole distributor of Gutermann Technology GmbH, Germany.

October, 2010

Became sole distributor in Japan of Hermann Sewerin GmbH, manufacturer of leak detectors for gas and water industries.

May, 2013

D305 Water Leakage Search Device for PVC pipes has been published by international application of patent under No.W02013/065351


Accepted Pilot Survey project in Medan Indonesia by JICA, and implemented leak
detection using particularly D305 PVC leak detector. Succeeded to reduce NRW by 17% until May 2015.

February, 2015

Applied international patent of Hydrogen&Nitrogen gas production unit for leak detection with tracer gas. (01669W001)

We are continuously working for JICA project in Philippines and India.

In Japan, we work together with 40 individual leak detection companies who use Goodman equipment throughout Japan as actual leak detecting group.



TEL:045-701-5680  FAX:045-701-4302

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