From Wikipedia, the free encyclopedia
  (Redirected from Suwa Seikosha)
Jump to navigation Jump to search

Seikosha (精工舎, Seikōsha) was a branch of the Japanese company Seiko that produced clocks, watches, shutters, computer printers and other devices. It was the root of the manufacturing companies of the Seiko Group.


Seiko Quartz Astron 35SQ, the world's first commercial quartz watch developed by Suwa Seikosha
  • 1881 — Kintarō Hattori opens the watch and jewelry shop "K. Hattori" (Hattori Tokeiten in Japanese; currently named Seiko Holdings Corporation) in the Ginza area of Tokyo, Japan.[1]
  • 1892 — Seikosha is established in Tokyo as the clock manufacturing arm of K. Hattori.
  • 1917 — K. Hattori becomes a company (K. Hattori & Co., Ltd.).
  • 1937 — The watch production division of Seikosha is split off as Daini Seikosha Co., Ltd. (第二精工舎, literally The Second Seikosha).
  • 1942 — Daiwa Kogyo, Ltd. is founded in Suwa, Nagano by Hisao Yamazaki.
  • 1943 — Daini Seikosha establishes a factory in Suwa for manufacturing watches with Daiwa Kogyo.
  • 1959 — Daiwa Kogyo and the Suwa Plant of Daini Seikosha merge to form Suwa Seikosha Co., Ltd. (諏訪精工舎)
  • 1961 — Shinshu Seiki Co., Ltd. is established as a subsidiary of Suwa Seikosha.
  • 1970 — Seikosha is split off from K. Hattori & Co., Ltd., and Seikosha Co., Ltd. is incorporated.
  • 1982 — K. Hattori & Co., Ltd. is renamed Hattori Seiko Co., Ltd.
  • 1982 — Shinshu Seiki is renamed Epson Corporation.
  • 1983 — Daini Seikosha is renamed Seiko Instruments & Electronics Ltd.
  • 1985 — Suwa Seikosha and Epson merge to form Seiko Epson Corporation.
  • 1990 — Hattori Seiko Co., Ltd. is renamed Seiko Corporation.
  • 1996 — Seikosha Co., Ltd. is divided into Seiko Precision Inc. and Seiko Clock Inc.
  • 1997 — Seiko Instruments & Electronics is renamed Seiko Instruments Inc.
  • 2007 — Seiko Corporation is renamed Seiko Holdings Corporation.[2]
  • 2009 — Seiko Instruments becomes a wholly owned subsidiary of Seiko Holdings.
  • 2020 — Seiko Instruments transfers its watch business (development and manufacturing of the Seiko timepieces) to Seiko Watch Corporation.


  1. ^ "Seiko Instruments history". Seiko Instruments. Retrieved 2009-10-02. CS1 maint: discouraged parameter (link)(in English)
  2. ^ "Seiko Holdings history". Seiko Holdings. Retrieved 2009-10-02. CS1 maint: discouraged parameter (link)(in English)

External links[edit]