Seiko was established as Seikosha Co., Ltd. in 1892. Then in 1937, Daini Seikosha Co., Ltd. was established as the watch manufacturer for the SEIKO Group. The Company launched its product diversification activities in 1970. Now in 2009, Seiko became a wholly-owned subsidiary of Seiko Holdings Corporation.

The products of SII include electronic components, information system, scientific instrument, communication products, machine tools and printer. SII create new value in skills and techniques, such as miniaturization technologies to reduce product size, precision processing technologies, rigorously designed energy efficient products, and their fabrication technology. In today's dynamic business environment, Seiko is faced with many challenges. SII continues to develop advanced micro mechanical, low power consumption, and nano-scale technologies leveragingprecision instrument manufacturing expertise in order to responding quickly and flexibly to the diverse and constantly changing needs of individuals, corporations, and society. Seiko promises to be good corporate citizens while contributing to society's progress.

Product line:
Micro Battery
MS Rechargeable Battery
TS Lithium Rechargeable Battery
ML Lithium Rechargeable Battery
Chip type Electric Double Layer Capacitor
Silver Oxide Battery
SPRON
SPRON100
SPRON510
DIANET
Horizontal Magnetic Field Molding
Vertical Magnetic Field Molding

SII is product portfolio consists of Power management IC, memory, sensor, timer IC, analog IC, vehicle IC, etc..