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The Seiko Instruments Inc. semiconductor business has been spun off as a separate joint-venture entity called SII Semiconductor Corporation through joint investment with the Development Bank of Japan Inc. (DBJ) and will commence operation in January 2016.

Leveraging DBJ’s extensive network and know-how in the field of M&A strategy, the new company aims to establish a global presence in the semiconductor industry.

We began in-house development and fabrication of CMOS ICs based on the production of the world’s first practical quartz watches in which CMOS ICs were incorporated. Since then, we have made a significant contribution to the electronics industry by providing small, low-power consumption, and high-precision analog semiconductor products, not only for watches, but also for a wide range of consumer, mobile, and automotive devices.




Seiko Instruments Inc.

Seiko Instruments Inc. (SII) is based on more than seven decades of dependable precision timepiece design, development and manufacturing. In today’s dynamic business environment, we are faced with the challenge of responding quickly and flexibly to the diverse and constantly changing needs of individuals, corporations, and society.

To meet this challenge, SII will continue to develop advanced micro mechanical, and low power consumption leveraging our precision instrument manufacturing expertise.

Throughout these transformations, SII will continue to be the company of choice for products and services to meet the needs of today’s society.

We will work harder than ever to be good corporate citizens while contributing to society’s progress.

Product: Micro Battery, Crystal unit, Thermal printer


Main Products

<Quartz Crystal>Seiko Instruments Inc.

Miniaturization of the tuning fork crystal, SMD type suitable for automatic & high density surface mounting. Excellent shock and heat resistance.

<Micro Battery>Seiko Instruments Inc.

Strong in an electric leakage, excellent overdischarge charactaristics and longer cycle life.
MS Rechargeable Battery
ML Lithium Rechargeable Battery
XH Capacitors
Chip Capacitors
CPX Capacitors
Silver Oxide Battery

Horizontal Magnetic Field Molding
Vertical Magnetic Field Molding

<Thermal Printer>Seiko Instruments Inc.

With low voltage printer mechanism for battery operated terminal, and high speed and high durability printer mechanism for POS, ECR and KIOSK system.