Tomoe Engineering Co., Ltd.
Japanese mid-sized chemical machinery maker and specialist trading house, a domestic leader in decanter-type centrifuges.
Last updated September 26, 2026
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Overview
Tomoe Engineering Co., Ltd. (巴工業株式会社) is a Japanese mid-sized chemical machinery manufacturer and specialist trading company headquartered in Kita-Shinagawa, Shinagawa-ku, Tokyo. It operates two core businesses: a manufacturing arm that builds industrial centrifuges and related separation equipment, and a trading arm that imports and distributes chemical industrial products. The company is described as the domestic leader in decanter-type centrifuges in Japan. The company was established in 1941 in Shimbashi, Shiba-ku, Tokyo. Its centrifuge business began in 1950, when it concluded a technical assistance agreement with the U.S. firm Sharples and started manufacturing and selling centrifuges. In 1952 it acquired sales rights from Union Carbide of the United States for various synthetic resins, Columbia activated carbon and other products, laying the foundation of its chemical trading business. Over the following decades it expanded its manufacturing footprint with the Sagami Plant (1969) and Shonan Plant (1999), and moved into environmental preservation applications such as industrial wastewater and municipal sewage treatment from 1970. Tomoe Engineering has built a global network of subsidiaries and offices. It opened its first overseas base, a Seoul branch, in 1988, followed by a Jakarta office (1998), Tomoe Engineering (Hong Kong) Co., Ltd. (2004), Tomoe Engineering USA, Inc. in Liberty, Texas (2013), TOMOE Trading (Thailand) Co., Ltd. in Bangkok (2015), TOMOE TRADING VIETNAM CO., LTD. in Hanoi and TOMOE TRADING (MALAYSIA) SDN.BHD. in Kuala Lumpur (2021), TOMOE Advanced Materials s.r.o. in Prague (2022), and an India resident office in Chennai (2024). The company listed its shares over the counter with the Japan Securities Dealers Association in 1996, listed on the Second Section of the Tokyo Stock Exchange in 2004, was designated to the First Section in 2005, and moved to the Tokyo Stock Exchange Prime Market in 2022. Its representative director and president is Akitomo Tamai. Group companies include Tomoe Kikai Service Co., Ltd., Tomoe Machinery Co., Ltd. and Tomoe Logistics Co., Ltd.
History
Tomoe Engineering Co., Ltd. was established in 1941 in Shimbashi, Shiba-ku, Tokyo. Its modern machinery business traces to 1950, when the company concluded a technical assistance agreement with the U.S. firm Sharples and began manufacturing and selling centrifuges. In 1952 it obtained sales rights from Union Carbide of the United States for various synthetic resins, Columbia activated carbon and other products, establishing the chemical trading side of the business. The company moved its head office to Nihonbashi, Chuo-ku, Tokyo in 1960. It opened the Sagami Plant in 1969 and, from 1970, began addressing environmental preservation applications such as industrial wastewater and municipal sewage. In 1978 it established Tomoe Kikai Service Co., Ltd., and in 1984 it made Akikyo Seisakusho Co., Ltd. (now Tomoe Machinery Co., Ltd.) a wholly owned subsidiary. Tomoe Logistics Co., Ltd. was established in 1987. International expansion began in 1988 with the opening of a Seoul branch, the company's first overseas base. In 1990 the horizontal decanter XM1006, described as the world's largest in processing capacity for sewage treatment, was completed and put to work at the Tokyo Morigasaki treatment plant. In 1997 the vertical decanter TRV875, the world's largest for terephthalic acid production processes, was completed. A Jakarta office opened in Indonesia in 1998, and the Shonan Plant opened in 1999. On the capital markets side, the company registered its shares over the counter with the Japan Securities Dealers Association in 1996. It listed on the Second Section of the Tokyo Stock Exchange in 2004, the same year it established Tomoe Engineering (Hong Kong) Co., Ltd. In 2005 it was designated to the First Section of the Tokyo Stock Exchange. The head office moved to Osaki, Shinagawa-ku, Tokyo in 2007 and to Kita-Shinagawa, Shinagawa-ku in 2015. Further overseas expansion followed: Tomoe Engineering USA, Inc. was established in Liberty, Texas, United States in 2013; TOMOE Trading (Thailand) Co., Ltd. was established in Bangkok in 2015; and in 2021 TOMOE TRADING VIETNAM CO., LTD. was established in Hanoi, Vietnam, and TOMOE TRADING (MALAYSIA) SDN.BHD. in Kuala Lumpur, Malaysia. In 2022, with the Tokyo Stock Exchange's migration to new market segments, the company moved to the Prime Market; in the same year TOMOE Advanced Materials s.r.o. was established in Prague, Czech Republic, and a Shanghai branch of Tomoe Hui Trading (Shenzhen) Co., Ltd. was set up. In 2024 an India resident office was opened in Chennai, India. Tomoe Engineering is characterized as a mid-sized chemical machinery maker with both a manufacturing division for centrifuges and a specialist trading division importing chemical industrial products, and is described as the domestic leader in decanter-type centrifuges. Its founder, Shiro Yamaguchi, was a promoter of the Japan Yacht Association (now the Japan Sailing Federation) founded in 1932, and sent six sailors to the 1964 Tokyo Olympics as part of the Japanese team.
- 2022
Moved to the Tokyo Stock Exchange Prime Market; established TOMOE Advanced Materials s.r.o. in Prague, Czech Republic; set up a Shanghai branch of Tomoe Hui Trading (Shenzhen) Co., Ltd.
- 2021
Established TOMOE TRADING VIETNAM CO., LTD. in Hanoi, Vietnam, and TOMOE TRADING (MALAYSIA) SDN.BHD. in Kuala Lumpur, Malaysia.
- 2019
Established Tomoe Ei Machinery Equipment (Taicang) Co., Ltd. in Taicang, Jiangsu Province, China.
- 2015
Moved head office to Kita-Shinagawa, Shinagawa-ku, Tokyo; established TOMOE Trading (Thailand) Co., Ltd. in Bangkok.
- 2013
Established Tomoe Engineering USA, Inc. in Liberty, Texas, United States.
- 2012
Established Tomoe Hui Trading (Shenzhen) Co., Ltd. in Shenzhen, Guangdong Province, China.
- 2007
Moved head office to Osaki, Shinagawa-ku, Tokyo.
- 2005
Designated to the First Section of the Tokyo Stock Exchange.
- 2004
Listed on the Second Section of the Tokyo Stock Exchange; established Tomoe Engineering (Hong Kong) Co., Ltd.
- 1999
Opened the Shonan Plant.
Products and positioning
A composite company providing advanced technology and products, combining a centrifuge manufacturing business with a chemical products specialist trading business; domestic leader in decanter centrifuges.
Horizontal decanter XM1006
Completed in 1990 as the world's largest in processing capacity for sewage treatment; deployed at the Tokyo Morigasaki treatment plant.
Vertical decanter TRV875
Completed in 1997 as the world's largest for terephthalic acid production processes.
Centrifuges (manufacturing and sales)
Core machinery business, begun in 1950 under a technical assistance agreement with Sharples (U.S.).
Chemical industrial products (import and distribution)
Specialist trading business, including synthetic resins and Columbia activated carbon obtained via Union Carbide sales rights in 1952.
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