Tsuda Electric WIRE Cable MFG. Co., Ltd.
Japanese wire and cable manufacturer founded in 1854 in Kyoto, producing power, communication, optical and electronic cables.
Last updated September 27, 2026
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Overview
Tsuda Electric WIRE Cable MFG. Co., Ltd. (津田電線株式会社, Tsuda Densen) is a Japanese manufacturer of electric wires, cables and optical-related products headquartered in Fushimi-ku, Kyoto. The company traces its origins to 1854 (the first year of the Ansei era), when founder Yukibei Tsuda began drawing copper wire using waterwheel power on the left bank of the Takano River in the Rakuhoku area of Kyoto. It was formally incorporated as a joint-stock company on 26 May 1931. Today it operates primarily in the wire and cable business, while also applying cable technology to optical products and metal harnesses. The company's product range covers signal cables, optical-related products, industrial wires and cables, cables for electronic equipment, and cables and harnesses for platform screen doors. Its manufacturing history includes supplying communication copper wire to the Ministry of Engineering (Kōbushō) in 1881, cotton-covered wires to electric light companies in 1885, trolley and transmission lines to Kyoto Electric Railway in 1895, and later rubber-insulated, synthetic-resin, cross-linked polyethylene, flame-retardant, nuclear power plant, non-halogen, and optical fiber products. It began manufacturing optical fiber products in 1989 and has continued to expand its optical connector harness capacity. Tsuda Densen is a relatively small, privately held company. According to its company profile, it has capital of 100 million yen and 96 employees, with a factory site area of 38,065 m² and a building area of 18,943 m². Its main bank relationships are with MUFG Bank, Bank of Kyoto and Shiga Bank. The company operates an optical processing division and headquarters in Fushimi-ku, Kyoto, an Iga Plant in Mie Prefecture, a Tokyo sales office in Chiyoda-ku, and an Okubo office in Uji, Kyoto. Monthly production capacity includes 1,300 t of bare wire, 1,700 t of covered wire, 240 t of power cable, 180 t of communication cable, 4,000 km-core of optical cable, and 10,000 optical connector harnesses. The company emphasizes research and development, quality management and environmental responsibility. It has held ISO 9001 certification since 1996 and ISO 14001 certification since 1999, and it registered the English trademark "TSUDA" in 2006. In 2024 it marked its 170th anniversary, closed the Kumiyama Plant and opened the Iga Plant, and established a new headquarters and optical processing plant in Fushimi-ku, Kyoto. The current representative director and president is Naohiro Tsuda.
History
Tsuda Electric WIRE Cable MFG. Co., Ltd. traces its history to 1854 (Ansei 1), when founder Yukibei Tsuda began drawing copper wire using waterwheel power on the left bank of the Takano River in Yasé Village, Rakuhoku, Kyoto. A factory layout drawing from that time records the position of the waterwheel used as power, and waterwheels had long been used for power in the area, appearing on Taisho-era maps as well. In 1881 the company supplied communication copper wire to the Ministry of Engineering (Kōbushō), and in 1885 it supplied cotton-covered wires to electric light companies in various regions. In 1894 it opened the Fushimi Plant, and in 1895 it supplied trolley wires and transmission lines to Kyoto Electric Railway. In 1901 it began manufacturing rubber-insulated wire and supplied it to government offices. In 1906 it established a general partnership company (Gōmei Kaisha), and in 1912 it opened the Yahata Plant, relocated from the Takano Plant. In 1921 it imported a lead sheathing machine from Germany and began manufacturing lead-sheathed rubber wire. On 26 May 1931 the company was incorporated as a joint-stock company (Kabushiki Kaisha). In 1951 it began manufacturing synthetic resin wires, and in 1965 it opened the Kumiyama Plant. In 1966 it began manufacturing cross-linked polyethylene wires, and in 1967 it closed the Fushimi Plant and integrated its equipment into the Kumiyama Plant. In 1968 it introduced a welded corrugated metal sheathing manufacturing system from Kabelmetal of West Germany and began manufacturing Corrugated Metal (Korman) cable. In 1971 it closed the Yahata Plant and integrated its equipment into the Kumiyama Plant. In 1974 it was nominated by the Nippon Telegraph and Telephone Public Corporation (Denden Kōsha) to supply city CCP cable. In 1975 it increased capital to 300 million yen and integrated its head office functions into the Kumiyama Plant. In 1976 it began manufacturing flame-retardant cable and spun off indirect departments to establish Tsuden Kosan Co., Ltd. In 1978 it began supplying cables for nuclear power generation. In 1982 it was nominated by electric power companies to supply watertight wires and began manufacturing wires for electronic equipment. In 1984 it obtained UL and CSA certification. In 1985 it began manufacturing non-halogen cable and renamed Tsuden Kosan Co., Ltd. to Shinden Co., Ltd. In 1986 it was nominated by electric power companies to supply dry-type cross-linked cable. In 1987 it began manufacturing ultra-fine covered wires for electronic equipment. In 1988 it spun off the electronic equipment cable processing division and inspection machine manufacturing division to establish Tsuda Elec Co., Ltd. In 1989 it began manufacturing optical fiber products. In 1992 it added optical fiber cable collective mass-production machines. In 1993 it received the Minister of Labour Excellent Award for labor health management. In 1996 it obtained ISO 9001 certification (JQA), and in 1999 it obtained ISO 14001 certification (JQA). In 2000 it established an in-house company, the Opto Device Company. In 2001 it began manufacturing eco (EM) communication and power cables. In 2002 it began manufacturing lead-free vinyl wires and cables. In 2003 it obtained ISO 9001 (2000 version) certification. In 2004 it celebrated its 150th anniversary. In 2005 it obtained ISO 14001 (2004 version) certification. In 2006 it registered the trademark for the English notation "TSUDA". In 2009 it obtained ISO 9001 (2008 version) certification. In 2012 it introduced a copper nugget machine, expanding copper recycling. In 2016 it reduced capital to 100 million yen. In 2017 it obtained ISO 14001 (2015 version) certification, and in 2018 it obtained ISO 9001 (2015 version) certification. In 2024 it closed the Kumiyama Plant, opened the Iga Plant, and established a new headquarters and optical processing plant in Fushimi-ku, Kyoto, marking its 170th anniversary.
- 1986
Nominated by electric power companies to supply dry-type cross-linked cable.
- 1985
Began manufacturing non-halogen cable; renamed Tsuden Kosan to Shinden Co., Ltd.
- 1984
Obtained UL and CSA certification.
- 1982
Nominated by electric power companies to supply watertight wires; began manufacturing wires for electronic equipment.
- 1978
Began supplying cables for nuclear power generation.
- 1976
Began manufacturing flame-retardant cable; established Tsuden Kosan Co., Ltd.
- 1975
Increased capital to 300 million yen and integrated head office functions into the Kumiyama Plant.
- 1974
Nominated by the Nippon Telegraph and Telephone Public Corporation to supply city CCP cable.
- 1971
Closed the Yahata Plant and integrated its equipment into the Kumiyama Plant.
- 1968
Introduced welded corrugated metal sheathing equipment from Kabelmetal (West Germany) and began manufacturing Korman cable.
Products and positioning
A long-established Japanese specialist wire and cable manufacturer emphasizing research, quality and environmental responsibility, serving power, communications, electronics and optical applications.
Signal cables
Cables for signal transmission.
Optical-related products
Optical fiber cords, MPO connector cords, and optical connector harnesses.
Industrial wires and cables
Power cables, communication cables, and other industrial wires and cables.
Cables for electronic equipment
Interface cables, control harnesses, and ultra-fine covered wires for electronic equipment.
Platform screen door cables and harnesses
Cables and harnesses for platform screen doors.
Large-diameter optical fiber cords
Optical energy transmission cords using large-core optical fiber, capable of transmitting large amounts of optical energy at once and compatible with various connectors.
MPO connector optical fiber cords
Optical fiber cords that can connect up to 12 fibers at once, ideal for space-saving locations.
Sources5 sources
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