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Corporate Information

Since the foundation of Seiken Precision Glass in 1974, the company has utilized its unique expertise in the pursuit of R&D on specialty glass products for major manufacturers. Our policy is to supply consistently stable products faithful to the original design through tireless investigations of process technologies. We are capable of producing highly accurate prototypes and manufacturing everything from small-lot to high volume orders.

Main Customers

  • Sony Corporation
  • Canon Inc.
  • Nikon Corporation
  • Olympus Corporation
  • Toyota Motor Corporation
  • NEC Corporation
  • Fujitsu Limited
  • Seiko EPSON Corporation
  • Sharp Corporation
  • Tosoh Corporation

Quality and Environmental Management

Sony Green Partner Program
Sony runs a "source management" system in all processes, from the raw materials stage to product shipment, to strictly control the content of environmentally toxic substances. Suppliers that have implemented this source management program are accredited as Green Partners.

Seiken Precision Glass was accredited in October 2008 as a Green Partner, based on the Green Partner Environmental Quality Accreditation System. Having achieved this Green Partner accreditation, we are still pursuing further environmental conservation programs.

Corporate Profile

Company Name : Seiken Precision Glass Co., Ltd.
Location : Head Office & Main Plant : No.16-29, 3-chome, Higashisuna, Kohtoh-ku,Tokyo.
    No.2 Plant : No.10-2, 2-chome, Higashisuna, Kohtoh-ku,Tokyo.
    Mito Plant : No.2078, Takasu, Hitachi oomiya-shi, Ibaraki-ken.
Executives : Michihiro Toida, CEO President
Foundation : May 13, 1974.
Capital : 18 million Japanese yen.
Nomber of employees : 40.
Bank Reference : Towa Bank, Minamisuna branch.
    Mitsuisumitomo Bank, Sunamati branch.
    Mitsubishi Tokyo UFJ Bank, Kameido North exit branch.
Business Domain :  
  Precision machine processing of glass materials for chemical industry.
  Lapping of various glass-made circuit boards for electronic industry.
  Various glass-made jigs for semiconductor device.
  Precision glass plate for silicon grinding.
  Various glass-made apparatus for pressure sensor.
  Fused silica, Vycor, Pyrex(borosilicate glass), Tempax, Soda glass, B-270
  And other special glass in general  

Material Manufacturers

Seiken Precision Glass buys in and stocks the glass materials manufactured by the following companies.

  • Corning Incorporated
  • Schott AG
  • Shin-Etsu Quartz Products Corporation
  • Toshiba Corporation
  • Hoya Corporation
  • Asahi Glass Corporation
  • Tosoh Quartz Corporation
  • And other material manufacturers