YAMASHIN-FILTER CORP.
Japanese comprehensive filter manufacturer and world leader in hydraulic oil filters for construction machinery.
Last updated September 26, 2026
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Overview
YAMASHIN-FILTER CORP. is a Japanese comprehensive filter manufacturer headquartered in Sakuragicho, Naka-ku, Yokohama, Kanagawa Prefecture. The company was founded in April 1956 as Yamashin Kogyo Co., Ltd. in Higashikamata, Ota-ku, Tokyo, by Masahiko Yamazaki, originally producing filter cloth for soy sauce and miso production. It later shifted into automotive subcontracting and then concentrated on filters for construction machinery, where it achieved the world's leading market share in hydraulic oil filters. The company changed its name to Yamashin Filter Co., Ltd. in October 2005 and listed on the Tokyo Stock Exchange Second Section in October 2014, moving to the First Section in March 2016 and to the Prime Market in 2022. Yamashin Filter operates two main business segments: construction machinery filters and air filters. The construction machinery filter segment covers hydraulic, engine oil, fuel, and transmission filters, as well as industrial filters for machine tools and agricultural machinery, and process filters for semiconductor plants, chemical plants, and food processing. The air filter segment, strengthened by the 2019 acquisition of Osaka-based air filter maker AXIE Co., Ltd., serves buildings, hotels, hospitals, museums, factories, and special applications such as wind power generators, office equipment, electronic equipment, medical equipment, machine tools, power distribution boards, and railway cars. The company also develops healthcare products, including medical-grade masks using its proprietary nanofiber technology, YAMASHIN Nano Filter™. Geographically, Yamashin Filter serves Japan, the United States, Europe, China, Thailand, the Philippines, Vietnam, and other Asian markets. Its production bases include the Saga Plant in Kamimine, Saga Prefecture; Cebu in the Philippines; Hanoi in Vietnam; and the AXIE air filter plant in Suminoe-ku, Osaka. Research and development is conducted at the Yokosuka Innovation Center in Yokosuka, Kanagawa. For the fiscal year ended March 2024, consolidated net sales were 18,024,732 thousand yen, with construction machinery filters accounting for 15,382,645 thousand yen and air filters 2,642,087 thousand yen. The company positions itself as a filtration specialist contributing to a sustainable society through its filtration wisdom and technology.
History
Yamashin Filter was founded in April 1956 as Yamashin Kogyo Co., Ltd. in Higashikamata, Ota-ku, Tokyo, with capital of 500 thousand yen, by Masahiko Yamazaki, a native of Saga Prefecture. The company began by manufacturing and selling filter cloth used in the production of soy sauce and miso. In September 1966, it opened a head office factory in Omorinishi, Ota-ku, Tokyo, and moved its head office there. A second factory was opened in Omorinishi in October 1972. In May 1975, the Saga Plant was established in Kamimine Village (now Kamimine Town), Miyaki District, Saga Prefecture, the founder's home region. Full-scale production of filter elements began at the Saga Plant in February 1977, followed by full-scale production of glass fiber filter media in February 1978. In August 1981, YSK Kogyo Co., Ltd. was established. In October 1984, an R&D laboratory was opened in Higashioi, Shinagawa-ku, Tokyo, and in November 1984 the company began manufacturing and selling precision process filters. In April 1989, Yamashin Cebu Filter Manufacturing Corporation was established in Cebu, Philippines. In December 1991, the head office was moved from Omorinishi, Ota-ku, Tokyo, to Nishikanagawa, Kanagawa-ku, Yokohama, Kanagawa Prefecture. In April 1992, the company merged with YSK Kogyo Co., Ltd. In July 1995, the head office and second factories in Ota-ku were transferred to the Saga Plant, and the former head office factory became the R&D laboratory; in the same month, Yamashin America Incorporated was established in Chicago, USA. In April 1996, Yamashin Europe B.V. was established in Rotterdam, the Netherlands. In February 2001, Yamashin Thai Limited was established in Ayutthaya, Thailand. ISO 9001 certification was obtained in September 2001, and ISO 14001 in April 2003. In April 2002, a precision filter manufacturing plant was completed in Ayutthaya, Thailand, and production began. In October 2005, the company changed its name from Yamashin Kogyo Co., Ltd. to Yamashin Filter Co., Ltd. In May 2007, a new factory for Yamashin Thai Limited was opened in Ayutthaya, Thailand, and Yamashin Filter Shanghai Incorporated was established in Shanghai, China. In June 2007, the R&D laboratory was transferred to the Saga Plant, and in December 2007 the head office was moved from Nishikanagawa, Kanagawa-ku, Yokohama, to Sakuragicho, Naka-ku, Yokohama. In September 2010, Yamashin Filter (SIP) Research & Development Center Incorporated was established in Suzhou, China. In November 2010, a sales office of Yamashin Thai Limited was opened in Bangkok, Thailand. In December 2010, Yamashin Europe Brussels BVBA was established in Brussels, Belgium. In March 2011, Yamashin Europe Brussels BVBA absorbed Yamashin Europe B.V. In October 2011, the Yokohama Development Center was opened in Sugita, Isogo-ku, Yokohama, and the R&D laboratory at the Saga Plant was transferred there. In June 2012, YSK Co., Ltd. was established in Kamimine Town, Miyaki District, Saga Prefecture. In December 2012, Yamashin Thai Limited's factory was closed and the company converted to a sales company, moving its head office from Ayutthaya to Bangkok. In February 2013, Yamashin Filter (SIP) Research & Development Center Incorporated was renamed Yamashin Filter (SIP) Technology Incorporated. In October 2014, the company listed its shares on the Second Section of the Tokyo Stock Exchange, and in November 2014 increased its capital to 822 million yen. In March 2016, it was designated as a First Section stock of the Tokyo Stock Exchange. In April 2017, the process filter manufacturing business of YSK Co., Ltd. was transferred to Yamashin Filter Co., Ltd. In December 2017, the Yokosuka Media Lab was opened. In August 2019, the company acquired all shares of AXIE Co., Ltd., an air filter manufacturer in Osaka, making it a subsidiary. In 2022, with the reorganization of the Tokyo Stock Exchange market segments, the company moved to the Prime Market. In 2020, responding to the global mask shortage caused by the COVID-19 pandemic, the company began selling masks using nanofiber technology. In 2017, it had developed filters using nanofibers. The company continues to operate as a comprehensive filter manufacturer with a global network.
Founded as Yamashin Kogyo Co., Ltd. in Higashikamata, Ota-ku, Tokyo, with capital of 500 thousand yen.
Opened head office factory in Omorinishi, Ota-ku, Tokyo, and moved head office there.
Opened second factory in Omorinishi, Ota-ku, Tokyo.
Established Saga Plant in Kamimine Village, Miyaki District, Saga Prefecture.
Began full-scale production of filter elements at Saga Plant.
Began full-scale production of glass fiber filter media at Saga Plant.
Established YSK Kogyo Co., Ltd.
Opened R&D laboratory in Higashioi, Shinagawa-ku, Tokyo.
Began manufacturing and selling precision process filters.
Established Yamashin Cebu Filter Manufacturing Corporation in Cebu, Philippines.
Products and positioning
Comprehensive filter manufacturer and filtration specialist contributing to a sustainable society through filtration wisdom and technology.
Construction machinery hydraulic filters
Oil filters for hydraulic systems of construction machinery; world's leading market share.
Engine oil filters
Filters for engine oil in construction and industrial machinery.
Fuel filters
Filters for fuel systems.
Transmission filters
Filters for transmission systems.
Process filters
Precision filters for semiconductor plants, chemical plants, and food processing.
Air filters
Air filters for buildings, hotels, hospitals, museums, factories, and special applications.
YAMASHIN Nano Filter™
Nanofiber filter technology developed in 2017.
Yamashin Filter Mask
Medical-grade masks using nanofiber technology, launched in 2020.
Sources6 sources
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