Seiko Instruments

Last updated
Seiko Instruments Inc.
Type Subsidiary
Industry Electronics
Founded1937;84 years ago (1937)
Tokyo, Japan
Headquarters Chiba, Chiba, Japan
Key people
  • Yoshinobu Nakamura, Chairman
  • Tetsu Kobayashi, President
ProductsMicromechatronics devices, Network components, Information-related equipment and services, Printers, Scientific instruments, etc.
RevenueDecrease2.svg ¥51,700 million (nonconsolidated); ¥239,100 million (consolidated) (Fiscal year ended March 31, 2020)
Number of employees
557 (nonconsolidated); 3,234 (consolidated) as of April 1, 2020
Parent Seiko Holdings Corporation
Website SII Home

Seiko Instruments Inc. (セイコーインスツル株式会社, Seikō Insutsuru Kabushiki-gaisha) (SII) is a Japanese company, which develops and commercializes semiconductor, micromechatronics, and precision machining technologies. It is one of business units of the Seiko Holdings Group.

Headquartered in the Makuhari business district, Mihama-ku, Chiba City, Chiba Prefecture, Japan, the company manufactures and sells electronic components (crystal oscillators, micromechatronics devices, piezo inkjet printheads, microbatteries, supercapacitors), precision parts, analysis and measurement instruments, machine tools, factory automation systems, printers, etc.

In 1937 Daini Seikosha Co., Ltd. (第二精工舎, Dai-ni-seikōsha), literally the second workshop for manufacturing Seiko timepieces, was established in Kamedo, Kōtō, Tokyo as a spin-off of the watch manufacturing division from Seikosha (精工舎, Seikōsha), so had been making the Seiko watches until 2020. The company changed its name to Seiko Instruments & Electronics Ltd. in 1983 and to the current name in 1997. Its Suwa Plant in Suwa, Nagano Prefecture spun off as Suwa Seikosha Co., Ltd. (諏訪精工舎, Suwa Seikōsha) in 1959 is now known as Seiko Epson (セイコーエプソン, Seikō Epuson).

On January 26, 2009, Seiko Instruments and Seiko Holdings 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 the date that had been announced before.

Seiko had delegated a large portion of the manufacturing in its watch business to SII. Watches manufactured by SII were sold through the Seiko Watch Corporation, a subsidiary of Seiko Holdings Corporation. On April 1, 2020, the company transferred its watch business including its watch manufacturing subsidiaries Morioka Seiko Instruments, Ninohe Tokei Kogyo, Seiko Instruments Singapore, etc. to Seiko Watch.

Related Research Articles

Okaya, Nagano City in Chūbu, Japan

Okaya is a city located in Nagano Prefecture, Japan. As of 1 February 2019, the city had an estimated population of 48,616 in 19257 households, and a population density of 570 persons per km². The total area of the city is 85.10 square kilometres (32.86 sq mi).

Orient Watch

Orient Watch is a Japanese watch brand owned by Epson. Established as an independent company in 1950, it became a functional subsidiary of Epson in 2009 before being fully integrated into the company in 2017.

Pentax Japanese optics company and brand owned by Ricoh

Pentax is a brand name used primarily by the Japanese multinational imaging and electronics company Ricoh for DSLR cameras, lenses, sport optics, and CCTV optics. The Pentax brand is also used by Hoya Corporation for medical products & services, TI Asahi for surveying instruments, and Seiko Optical Products for certain optical lenses.

Seikosha 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 Japanese holding company

Seiko Holdings Corporation, commonly known as Seiko, is a Japanese maker of watches, clocks, electronic devices, semiconductors, jewelries, and optical products. Founded in 1881, it is known for introducing one of the world's first quartz wrist watches as well as the world's first quartz watch with a chronograph complication.

Epson Japanese electronics company

Seiko Epson Corporation, or simply known as Epson, is a Japanese electronics company and one of the world's largest manufacturers of computer printers, and information and imaging related equipment. Headquartered in Suwa, Nagano, Japan, the company has numerous subsidiaries worldwide and manufactures inkjet, dot matrix and laser printers, scanners, desktop computers, business, multimedia and home theatre projectors, large home theatre televisions, robots and industrial automation equipment, point of sale docket printers and cash registers, laptops, integrated circuits, LCD components and other associated electronic components. It is one of three core companies of the Seiko Group, a name traditionally known for manufacturing Seiko timepieces since its founding.

Titan Company Indian watch manufacturing company

Titan Company Limited is an Indian luxury products company that mainly manufactures fashion accessories such as watches, jewellery and eyewear. Part of the Tata Group and started as a joint venture with TIDCO, the company is headquartered in Hosur, Tamilnadu.

Spring Drive Hybrid (mechanical and quartz) watch movement

The Spring Drive is a watch movement conceived in 1977 by Yoshikazu Akahane at Suwa Seikosha. Specified to one second accuracy per day, the movement uses a conventional gear train as in traditional mechanical watches, but rather than an escapement and balance wheel, instead features Seiko's Tri-synchro Regulator system in which power delivery to the watch hands is regulated based on a reference quartz signal.

Citizen Watch Core company of a Japanese global corporate group based in Tokyo, Japan

Citizen Watch Co., Ltd. is an electronics company primarily known for its watches and is the core company of a Japanese global corporate group based in Nishitokyo, Tokyo, Japan. In addition to Citizen brand watches, it is the parent of American watch company Bulova, and is also known for manufacturing small electronics such as calculators.


Topcon Corporation is a Japanese manufacturer of optical equipment for ophthalmology and surveying.

SFCG CO.,LTD. (株式会社SFCG), a subsidiary of KE Holdings (株式会社KEホールディングス), is engaged in money-lending in Japan. The company filed for bankruptcy protection in February 2009.

HMT Limited, formerly Hindustan Machine Tools Limited, is a state-owned holding company under the Ministry of Heavy Industries and Public Enterprises in India. The company's wholly owned subsidiaries include HMT Machine Tools Limited and HMT International Limited. HMT also holds a majority stake in Praga Tools Limited (51%).

Seiko Group Japanese corporate group

Seiko Group 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.'

Astron (wristwatch) First quartz wristwatch in the world; made by Seiko in 1969

The Astron wristwatch, formally known as the Seiko Quartz-Astron 35SQ, was the world's first "quartz clock" wristwatch. It is now registered on the List of IEEE Milestones as a key advance in electrical engineering.

NSK Ltd.

NSK Ltd., also known in some markets as NSK Automation, is a large manufacturer of bearings globally and the largest in Japan. The company produces industrial machinery bearings, precision machinery and parts, and automotive bearings and components.

NTN Corporation

NTN Corporation is one of the most prominent manufacturers of bearings in Japan, second domestically only to NSK Ltd. The company is one of the largest exporters worldwide of friction-reducing products such as constant-velocity joints.

Chino Corporation

Chino Corporation is a Japanese manufacturer of measuring instruments and controllers. Working as a Japan Calibration Service System-certified supplier, it manufactures and supplies a wide range of electrical measuring equipment, controllers, and systems. Chino also manufactures and supplies calibration systems and conducts traceability tests, and has been certified by the National Institute of Technology and Evaluation as a calibration accreditation company.

Adamant Namiki Precision Jewel Co., Ltd. is a Japanese precision components manufacturer based in Tokyo, Japan.

Kintarō Hattori Japanese watchmaker

Kintarō Hattori was one of the first and most important Japanese watchmakers in history, as well as the founder of Seiko, one of the world's largest manufacturers of watches.