Daiya Seiki Co., Ltd.

Daiya Seiki Co., Ltd. (株式会社ダイヤ精機製作所) is a Japanese precision-machining manufacturer headquartered in Okaya, Nagano Prefecture, on the shore of Lake Suwa. Founded on 1 May 1951 with capital of 800,000 yen in Okaya's Tanakadori district, the company today operates with capital of 40 million yen and about 160 employees, and is led by President Yuji Oguchi. Its core business is the manufacture of precision machine-tool components — notably collet chucks and guide bushes — together with tooling and, more recently, parts for medical electron microscopes. The company describes itself as a multi-product, small-lot producer, a direction it deliberately took from 1964 when it increased capital and strengthened its tooling division. Over the decades it expanded its Okaya site with successive factory buildings (a three-storey plant in 1972, a second-factory west wing in 1984, a fourth factory and small gymnasium in 1989, a Kanayama plant in 1989, a Tokyo sales office in 1991, and a fifth factory dedicated to chucks and guide bushes in 2008), and opened a China production base, Daiya Precision Machinery (Changshu) Co., Ltd., in Changshu, Jiangsu, in 2007. It also maintains a Tokyo branch in Suginami and a Korea office in Busan. Quality and environmental certification are central to its identity: ISO 9001 (2000), ISO 14001 (2002) and ISO 13485 for medical-device quality management (2019). In 2019 it registered as a medical-device manufacturer and in 2024 obtained a Class III medical-device manufacturing and sales licence. It has been recognised by Japan's Ministry of Economy, Trade and Industry as one of the "300 Vibrant Small and Medium Manufacturing Companies" (2006) and as a "Regional Future-Leading Company" (2018), and won the Grand Prix at the Monozukuri Awards NAGANO 2019. Its stated motto is to "make good products with a beautiful heart and contribute to society through our work."

Daiya Seiki Co., Ltd. was established on 1 May 1951 in Tanakadori, Okaya City, Nagano Prefecture, with capital of 800,000 yen. In September 1952 it was commended by the Director-General of the Tokyo Regional Bureau of International Trade and Industry as a model factory for small and medium enterprise rationalisation. In October 1963 the company built and moved to a new factory in Oikawa, Okaya (its present location). In October 1964 it increased capital to 10 million yen, strengthened its tooling and jig division, and shifted toward multi-product, small-lot production. Through the 1970s and 1980s the company expanded its Okaya facilities: a three-storey new factory was completed in April 1972; it was designated a superior tax-return corporation by the Suwa Tax Office director in November 1975 (a designation it has retained); capital was increased to 20 million yen in May 1977; a west wing of the second factory was added in December 1984; capital rose to 40 million yen in April 1985; factory land of 1,541 m² was acquired in October 1985 and a further 1,654 m² in April 1986. In September 1986 it won the Science and Technology Agency Director-General's Encouragement Award at the Nagano Prefecture Invention and Innovation Exhibition for QTIC. A fourth factory and small gymnasium were completed in March 1989, and the Kanayama factory in May 1989. A Tokyo sales office was completed in October 1991. In October 2000 the company achieved 7.5 million hours (about 28 years) without a labour accident, receiving a Second-Class Accident-Free Record Certificate from the Director-General of the Labour Standards Bureau. It obtained ISO 9001 certification in November 2000 and held a 50th-anniversary ceremony in May 2001. ISO 14001 certification followed in December 2002. In April 2006 it was selected by the Ministry of Economy, Trade and Industry as one of the "300 Vibrant Small and Medium Manufacturing Companies." In March 2007 it established Daiya Precision Machinery (Changshu) Co., Ltd. in Changshu City, Jiangsu Province, China. A fifth factory specialising in chucks and guide bushes was completed in December 2008. The company marked its 60th anniversary in May 2011. In September 2013 it received an 11.3-million-hour accident-free record certificate from the Director-General of the Labour Standards Bureau. It was certified by Nagano Prefecture as a "Workplace Lively Advance Company" in October 2017 and recognised by METI as a "Health and Productivity Management Excellent Corporation" in February 2018. In July 2018 it won an excellence award at the Nagano Prefecture Industrial Safety and Health Conference, and in December 2018 was selected by METI as a "Regional Future-Leading Company." In March 2019 it obtained ISO 13485, the international quality-management standard specific to medical devices; in July 2019 it registered as a medical-device manufacturer; and in October 2019 it won the Grand Prix (top prize) at the Monozukuri Awards NAGANO 2019. A new factory was completed in December 2020, and in January 2021 it registered as a Nagano Prefecture SDGs Promotion Company. In March 2024 it obtained a Class III medical-device manufacturing and sales licence.

• 2020

  Completed a new factory.

• 2019

  Obtained ISO 13485; registered as a medical-device manufacturer; won Grand Prix at Monozukuri Awards NAGANO 2019.

• 2018

  Recognised as a METI Health and Productivity Management Excellent Corporation; selected as a Regional Future-Leading Company.

• 2017

  Certified by Nagano Prefecture as a 'Workplace Lively Advance Company'.

• 2013

  Received an 11.3-million-hour accident-free record certificate.

• 2011

  Marked 60th anniversary.

• 2008

  Completed the fifth factory specialising in chucks and guide bushes.

• 2007

  Established Daiya Precision Machinery (Changshu) Co., Ltd. in Changshu, Jiangsu, China.

• 2006

  Selected by METI as one of the '300 Vibrant Small and Medium Manufacturing Companies'.

• 2002

  Obtained ISO 14001 certification.

• 2001

  Held 50th-anniversary ceremony.

• 2000

  Achieved 7.5 million accident-free hours; obtained ISO 9001 certification.

• 1991

  Completed the Tokyo sales office.

• 1989

  Completed the fourth factory and small gymnasium, and the Kanayama factory.

• 1986

  Acquired a further 1,654 m² of factory land; won the Science and Technology Agency Director-General's Encouragement Award for QTIC.

• 1985

  Increased capital to 40 million yen; acquired 1,541 m² of factory land.

• 1984

  Extended the west wing of the second factory.

• 1977

  Increased capital to 20 million yen.

• 1975

  Designated a superior tax-return corporation by the Suwa Tax Office director (retained thereafter).

• 1972

  Completed a three-storey new factory.

• 1964

  Increased capital to 10 million yen; strengthened tooling division and moved toward multi-product, small-lot production.

• 1963

  Built and moved to a new factory in Oikawa, Okaya (present location).

• 1952

  Commended by the Tokyo Regional Bureau of International Trade and Industry Director-General as a model SME rationalisation factory.

• 1951

  Established in Tanakadori, Okaya City, Nagano, with capital of 800,000 yen.

Multi-product, small-lot precision machining specialist serving machine-tool and medical-device customers, with a strong quality/environmental certification and CSR orientation.

• Collet chucks

  Precision workholding components; a focus of the fifth factory completed in 2008.

• Guide bushes

  Precision machine-tool components produced at the dedicated fifth factory.

• Chuck sleeves

  Components that the company re-grinds and repairs to extend service life and reduce waste.

• Medical electron microscope components

  Precision parts for medical electron microscopes, covered by ISO 13485 and medical-device registrations.

1. 1会社概要 - ダイヤ精機製作所daiya.co.jp
2. 2沿革 - ダイヤ精機製作所daiya.co.jp
3. 3会社情報 - ダイヤ精機製作所daiya.co.jp
4. 4CSR - ダイヤ精機製作所daiya.co.jp
5. 5Daiya Seiki Co., Ltd. (Japan) - Wikidatawikidata.org