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中原 宇心

Hiroaki Nakahara
President and CEO
Sanwa Seimitsu Kogyo Co., Ltd.

The company was established in November 1968 as a manufacturer of diamond pellets (trade name: DIALLET), fixed abrasive grains for innovative precision lens processing using diamond fine powders.
Since then, we have produced metal and resin pellets and block type diamond with the support and cooperation of partners in the optical industry and contributed to streamlining precision grinding of optical camera lenses, optical equipment lenses, eyewear lenses, etc., including precision improvement, polishing cycle time reduction, etc.
It is said that the recent advancement of smartphones has made the environment surrounding the camera industry more demanding.
We also need to more widely maintain and extend the demand for our diamond tools while actively anticipating the development of the market from the global perspective we have cultivated. We would like to focus on new optical areas that are medical, eyewear, the industrial field, security, autonomous driving, etc., the processing of optical parts that are also essential to VR (virtual reality) and AR (augmented reality), and manufacture of high precision glass products and optical products made of special materials in various ways and manufacture unique products that are friendly to human society with the potential for Japanese small and medium-sized companies and workshops to continue to contribute to society.

History

History

1968 Establishment(Capital 3million yen)
1970 Capital by 3 million yen to 6 million yen
1972 “DIALLET” Trademark registration
1980 Acquired the factory site in Shirahata, Musashiurawa.
1986 Entered the Taiwan market and established the sales company.
1989 Increased the capital by 8 million yen to 20 million yen.
1990 Newly established business office in front of Musashiurawa Station.
1992 Increased the capital by 20 million yen to 40 million yen.
Started local production in Taiwan and operation of the Taipei Factory.
1993 Increased the capital by 7.2 million yen to 47.2 million yen.
2001 Reduce capital to 30 million yen
2003 Established the Shanghai Factory and started local production and sales in China.
2013 New factory in Kamekubo, Fujimino City completed, and the headquarters transferred there.
2017 Established a trading company in Hong Kong and started selling and purchasing prisms, lenses, jigs, and their related products.
2019 Established an electroplated wheel factory and realized integrated in-house production in Japan.
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