Seiko Group

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Seiko, SII and Epson logos. Three companies share "Seiko" in their official names but have different corporate visual identities.

Seiko Group (セイコー・グループ, Seikō Gurūpu) is a Japanese corporate group consisting of three core companies Seiko Holdings Corp. (Seiko), Seiko Instruments Inc. (SII) and Seiko Epson Corp (Epson). The three companies are linked by a common thread of timepiece technology. Epson has established its own brand image and rarely uses 'Seiko.'

Seiko Watch Corp., a subsidiary of Seiko Holdings Corp., markets SEIKO watches while Seiko Instruments Inc. and Seiko Epson Corp. manufacture their movements.[1]

Time Module (TMI), a member of the Seiko Group, was established in 1987 with funding from Seiko Watch Company, Seiko Instruments Inc., and Seiko Epson Corp. to manufacture watch movements.[2][3]

On January 26, 2009, Seiko Holdings and Seiko Instruments announced that the two companies will be merged on October 1, 2009 through a share swap. Seiko Instruments became a wholly owned subsidiary of Seiko Holdings on October 1, 2009.

  • Seiko Holdings Corporation (SEIKO, TYO: 8050, headquartered in Tokyo)
    • Seiko Watch Corporation (marketing watches)
    • Seiko Clock Inc. (development, manufacturing, sales and repair of clocks)
    • Seiko Sports Life Co., Ltd. (golf clubs, stopwatches, etc.)
    • Seiko Time Systems Inc. (system clocks, etc.)
    • Seiko Service Center Co., Ltd. (repair and after service for watches)
    • Seiko Business Services Inc. (general affairs & human resources)
    • Seiko Precision Inc. (electronic/micromechatronics devices, printers, information equipment, system clocks and production equipment, etc.)
    • Seiko NPC Corporation (semiconductors)
    • Seiko Jewelry Co., Ltd. (jewelry)
    • Seiko Optical Products Co., Ltd. (eyeglasses - lenses & frames)
    • Ohara Inc. (specialty optical glass; Seiko owns 32.2% TYO: 5218)
    • Wako Co., Ltd. (upscale specialty retailer)
    • Cronos Inc. (upscale specialty retailer)
    • etc.
  • Seiko Instruments Inc. (SII, Subsidiary of Seiko Holdings, headquartered in Chiba)
    • SII NanoTechnology Inc.
    • Morioka Seiko Instruments Inc.
    • SII Network Systems Inc.
    • SII Mobile Communications Inc.
    • SII Data Service Corp.
    • SII Printek Inc.
    • SII Microtechno Inc.
    • SII Micro Parts Ltd.
    • SII Micro Precision Inc.
    • Epolead Services Inc.
    • Seiko I Infotech Inc.
    • Seiko I Techno Research Co., Ltd.
    • Seiko EG&G Co., Ltd.
    • City Service Co., Ltd.
    • etc.
  • Seiko Epson Corporation (EPSON, TYO: 6724, headquartered in Suwa, Nagano)
    • Epson Sales Japan Corporation
    • Miyazaki Epson Corporation
    • Epson Direct Corporation
    • Epson Service Corporation
    • Epson Atmix Corporation
    • Epson Software Development Laboratory Inc.
    • Yasu Semiconductor Corporation
    • Seiko Epson Contact Lens Corporation
    • Seiko Lens Service Center Corporation
    • Epson Imaging Devices Corporation
    • Orient Watch
    • Trume Watch
    • etc.

See also[edit]


  1. ^ "Seiko Factory Visit - Trip Report Part 1". Fratello Watches. 2015-11-06. Retrieved 2021-01-14.
  2. ^ Time Module (TMI) website
  3. ^ "Profile: TMI", Hong Kong Trade Development Council

External links[edit]