Grinding! Polishing! To continuously strive to create newer, better products borne from long-standing technology and dedication and to create an environment that both fully meets our customers' needs and satisfies ourselves.

Company Information

Name Nihon Grinding Wheel Co., Ltd.
Headquarters Postcode: 164-0012
1-3-12 Honcho, Nakano-ku, Tokyo Prefecture
Factory and sales office Postcode: 300-2513
936, Hanyu-machi, Joso-shi, Ibaraki Prefecture
Our factory is located 20 minutes by car from the Yawara Interchange
on the Jobando Highway. By JR train, take the Joso Line bound for Mitsukaido
(transfer at Joban Line Toride-station or Tsukuba Express line Moriya-station).
Disembark at Mitsukaido-Station, then take a 15-minute taxi ride to our factory.
If you notify us in advance, we will gladly provide transportation from the Mitsukaido-station.
President Shuji Mizoguchi
Officers Directors: 3
Auditors: 1
Employees 15
Company incorporated May 1981
Founded:January 1921
Capital 40M JPY (deposited in full)
Scope of business By production method
  • Manufacture and sale of PVA elastic grinding and polishing stones
  • Manufacture and sale of resinoid grinding and polishing stones
  • Manufacture and sale of vitrified grinding and polishing stones
By application
  • Polishing stones for magnetic heads
  • Polishing stones for gravure rolls (copper cylinders for gravure printing)
  • Grinding stones for high-precision finishes
  • Dressers for diamond tools
  • Filters
  • Grinding stones for honing
  • Polishing stones for soft metals
  • Polishing stones for non-metals
  • General grinding stones
  • Grinding stones for heavy and coarse grinding
Other work incidental to the above
Production capacity 200 tons annually
Factory grounds 14,500 square meters
Factory building 2,686 square meters
Main financing banks MUFG Bank, Nakano Branch
Mizuho Bank, Shinjuku West Gate Branch
Sumitomo Mitsui Banking Corporation, Shinjuku West Gate Branch
Main clients Hanco Schileiftechnik AG
Oriental Diamond Tool Lab. Ltd.
Apollo Electronics Japan Co.,Ltd
Nitolex Corporation
Nippon Bend Co., Ltd.
Yokogawa Manufacturing Corporation
Main suppliers Nanko Abrasives Industry Co., Ltd.
Shoei Shokai Co., Ltd.
Asian Partners Co., Ltd.
Shinwa Syoji Co., Ltd.

History of Nihon Grinding Wheel Co., Ltd.

The company was founded in January 1921 to take over management of Sakurayama Kogyosho, which had been manufacturing alundum in the Nakano area of Tokyo since 1918. The company name was changed to Nihon Grinding Wheel at that time. In the over 100 years since our founding, we have leveraged proprietary expertise that is unrivaled by other firms and have garnered major acclaim for our work.
In 1935, the company was formalized as a joint-stock company. In May 1945, however, the plant was completely lost to an air raid in the midst of WWII.
Following WWII, the company set about to bringing the main Tokyo plant back online, and some manufacturing operations resumed. In April 1949, the company was incorporated as a limited company. In 1955, it was designated as a JIS plant. In February 1971, seeking to streamline operations, the plant was relocated to Mitsukaido-shi (present-day Joso-shi) in Ibaraki Prefecture.