History

Sep. 1963	Established in Okaya City, Nagano, and capitalized at 16 million yen under the degree of Sanko Co., Ltd. as a purpose of each precious press molds and making tools, precious stumping processing, etc. Oct. a company recreation trip in Katayamazu hot springs
Mar. 1966	Start of manufacturing and sales of parts of tape recorders and button switches.
Sep. 1967	Start of manufacturing and sales of parts of cameras and communicators. May. Lunch break in Okaya
Sep. 1969	Start of development, manufacturing, and sales of 60-minute bell timers.
Oct.1971	Matsumoto Sanko Co., Ltd was established in Shiojiri City, Nagano. (wholly owned subsidiary) Start of manufacturing and sales of pressed products for breakers and printers. Oct. Matsumoto Sanko was completed
Aug. 1973	Tomy Industries Ltd. was established in Matsumoto City, Nagano (wholly owned subsidiary) Start of manufacturing and sales button switches.
May. 1974	Start of manufacturing and sales of various types of DC solenoids.
Jul. 1975	Start of manufacturing and sales of cases for digital wristwatches.
Aug. 1976	Start of manufacturing and sales of switch mechanisms for microwave ovens.
Jun. 1977	Start of manufacturing and sales of parts for VTR.
Feb. 1978	Start of assembly and sales of mechanical units for car stereos and tape recorders.
Jun. 1979	Start of assembly and sales of VTR cassette housings.
Sep. 1980	Consolidated Sanko Seisakusho (The business contents…Press stumping processing for each precision part).
Apr. 1981	Start of manufacturing and sales of parts for video disks.
Aug. 1981	Tomy Industries Co., Ltd. was established in Matsumoto City, Nagano (wholly owned subsidiary).
Sep. 1981	Matsumoto Sanko Co., Ltd., and Tomy Industries Ltd. merged with Tamura Seiko Co., Ltd. to change the par value of shares and strengthen competitiveness. The trade name was changed to Sanko Co., Ltd. May. Matsumoto Sanko 10th Anniversary Party
Mar. 1982	Start of assembly and sales of mechanical units for copying machines.
Sep. 1982	Start of assembly and sales of mechanical units for printers.
Jul. 1983	Established Horigane Factory where is specializing in automated labor-saving large precision presses in Horigane village, Minami Azumi-gun, Nagano. Start of assembly, sales, and manufacturing of mechanical units for floppy disks.
May. 1984	Public offering of shares on the over-the-counter market and capital increase at market value.
Dec. 1984	Established Azusagawa Factory for assemblies in Azusagawa village, Minami Azumi-gun, Nagano. Dec. Azusagawa Factory was completed
May. 1988	Moved Head Office to Shiojiri City, Nagano.
Aug. 1989	Established Mita Factory for injection molding in Horigane village, Minami Azumi-gun, Nagano.
Jul. 1990	Established Tokyo Sales Office in Chiyoda-ku, Tokyo for product distribution.
Oct. 1990	Extended Azusagawa Factory in the second stage Start of assembly and sales for LBP units. Aug. Construction work of Azusagawa Factory in the second stage
Mar. 1991	Start of a mounting substrate in Azusagawa Factory.
Oct. 1991	Extended Horigane Factory.
Dec. 1992	Extended Azusagawa Factory in the third stage.
Sep. 1993	Extended Mita Factory.
Aug. 1994	The 1st unsecured convertible bonds were issued.
Apr. 1999	Established Western Japan Sales Office in Tosu City, Saga.
Dec. 1999	listed the standard market of the Tokyo Stock Exchange.
Mar. 2000	Azusagawa Factory and Mita Factory acquired ISO14001 certification.
Oct. 2000	Established Fukuoka Mino Factory for mainly press stumping processing.
Nov. 2000	Extended Horigane Factory.
Apr. 2001	Okaya Factory, Horigane Factory, Head Office, and Head Office Factory acquired ISO14001 certification.
Dec. 2002	Moved Tokyo Sales Office to Shinjuku.
Apr. 2003	All factories acquired ISO9001 certification for 2000.
Apr. 2004	Established Nagoya Sales Office in Anjo City, Nagano. All factories acquired ISO14001 certification.
Jul. 2004	Power tools business is split off and Sanko Mitachi Co., Ltd. was established in Azumino city, Nagano Prefecture (wholly owned subsidiary).
Jul. 2006	Head Office, Head Office Factory, Horigane Factory, Azusagawa Factory, Mita Factory, and Nagoya Sales Office acquired ISO/TS16949 certifications.
Oct. 2006	Sanko Mitachi Co., Ltd. which had been a wholly owned consolidated subsidiary of the company, was sold to Sanko Tech Co.
Apr. 2009	The Mechatronics Division and the Plastics Division were integrated and consolidated into the Plastic Unit Division.
Jan. 2011	Established THAI SANKO CO., LTD in Ayutthaya, Thailand.
Mar. 2011	Integration and abolishment of Okaya Factory and Azusagawa Factory.
Dec. 2019	Extended Mita Factory
Sep. 2021	Acquired IATF16949 certifications (Horigane Factory, Mita Factory, Fukuoka Mino Factory, and THAI SANKO).