Nuclear Industrial Directory of Japan

Nuclear Industrial Directory of Japan

Nippon Gear Co., Ltd.


2F, Keihanshin Toranomon Building, 1-7-14 Nishi-Shinbashi, Minato-ku, Tokyo 105-0003 Japan

Contact Person
Mr. Yukimitsu Nakamiya

Corporate Information

Established in 1938, Nippon Gear Co., Ltd. (NGC) has expanded the business from a gear manufacturer to an assembly manufacturer of valve actuators, screw jacks, agitators, and gearboxes over the years.
Our products are widely used in multiple industries including, power plants (nuclear, thermal, hydro, bio, wind, solar, etc.), oil & gas, water & sewerage, steel manufacturing, food, chemical, mining, semiconductor industries, and much more.
NGC will continue to contribute to society through our products, and lead the industry.

Main Products and Services

Valve Actuators

NGC has been supplying valve actuators to multiple industries since 1968 and has continuously received high praise for the quality and durability of our products. Thus, we have a proven track record of supplying a multitude of key industrial sectors. We supplied over 340,000 units total domestically, and Internationally for valve actuators over our years of manufacturing valve actuators.

Our valve actuators are especially specialized for nuclear power plants, and NGC is the top manufacturer of valve actuators in Japan. We hold a share of over 96% of valve actuators supplied to nuclear power plants in Japan.
Japan : Over 150,000 units supplied
Overseas: Over 4,000 units supplied
Korea : Approx. 3,000 units
China : Approx. 700 units
India : Approx. 120 units
UAE : Approx. 700 units


Quality control according to ASME NQA-1-2008
IEEE 382-2006 compiant (JEAG 4623-2018)
-Environmental testing: thermal aging, vibration aging, seismic simulation, total radiation dose measure

Other Products

Screw Jack:

A gearbox that converts rotational motion to linear motion. A product with a wide range of usage, our screw jacks can be found in industries such as steel manufacturing, food, chemical, aerospace, textile, etc…


A device used to mix, blend, or agitate substances in order to form a homogenous product. Supplied to industries such as chemical, textile, thermal power sewerage, etc…


Since its start as a gear manufacturer, NGC continuously manufactures a variety of gears such as helical, bevel, hypoid, worm, high speed, etc. Specializes in custom-made medium size gears.