Tōhō Chemical Industries Co., Ltd.

Since its founding in 1938, Toho Chemical Industries Co., Ltd. has provided customers with high-performance chemical products, focusing on surfactants, special solvents, high‑molecular‑weight additives, and resin products.

Established in present-day Katsushika-ku, Tokyo with capital of 400,000 yen, and began manufacturing metal oil additives.

Began manufacturing textile additives.

Opened a Nagoya branch in Nagoya City.

Successfully developed technology for agricultural emulsifiers and dispersants, began manufacturing, and started production of industrial surfactants and paper additives.

Opened an Osaka branch in Osaka City.

Established a Tsuihama plant in Yokosuka City, Kanagawa Prefecture.

Started manufacturing synthetic rubber emulsion polymerization additives and synthetic resin products.

Completed manufacturing technology for solvent ethylene glycol monobutyl ether and achieved the first domestic production in Japan.

Listed on the Second Section of the Tokyo Stock Exchange.

Established a technology research institute in Yokosuka City, Kanagawa Prefecture (now Tsuihama Research Institute).

Acquired shares of paper additive manufacturer Kōdai Chemical Industries Co., Ltd. and made it a subsidiary (now a consolidated subsidiary).

Established a Tokuyama plant in Tokuyama City, Yamaguchi Prefecture (now Shunan City) and began manufacturing synthetic rubber emulsion polymerization additives.

Established subsidiary Tōhō Petroleum Resin Co., Ltd., built a Shikokai plant in the Shikokai area, and began manufacturing petroleum resin.

Established a surfactant research institute in Katsushika-ku, Tokyo (later relocated, now Chiba Research Institute).

Established subsidiary Tōhō Chiba Chemical Industries Co., Ltd., built a Sodegaura plant in the Keiyo coastal industrial area, and began manufacturing surfactants.

Started manufacturing polyethylene in subsidiary Tōhō Chiba Chemical Industries Co., Ltd.

Established subsidiary Yokosuka Environmental Technology Center Co., Ltd. and began environmental survey, measurement, and analysis services (now a consolidated subsidiary).

Built a new surfactant plant at Tsuihama and established mass production systems for solvents, crude oil additives, lubricating oil additives, etc.

Established a cationized cellulose production facility at the Tokyo plant.

Installed a continuous sulfonation unit at the Sodegaura plant of subsidiary Tōhō Chiba Chemical Industries Co., Ltd.

Absorbed and merged subsidiary Toho Petroleum Resin Co., Ltd. (now: Yokkaichi Plant)

Public offering of 2,000 thousand shares (capital increase to 1.755 billion yen)

Established a new research building in Yokosuka City, Kanagawa Prefecture

Absorbed and merged subsidiary Toho Chiba Chemical Industry Co., Ltd. (now: Chiba Plant)

Established a joint venture Kaishuu Toho Lin Chemical Products Co., Ltd. in Guangdong Province, China (now: consolidated subsidiary Kaishuu Toho Chemical Co., Ltd.)

Consolidated and relocated the Tokyo plant to the Chiba plant, and added a fine chemical plant within the same facility

Moved headquarters to Akashi-cho, Chuo-ku, Tokyo

Established a pilot plant at Oihama Research Institute

Installed new electronic information material manufacturing equipment at Chiba plant

Established subsidiary Toho Chemical Warehouse Co., Ltd. (now: consolidated subsidiary)

Obtained ISO 9001 certification (JQA-QM4007)

Established joint venture TOHO CHEMICAL (THAILAND) CO., LTD. in Bangkok, Thailand (current location: Samut Prakan Province)

Obtained ISO 14001 certification (JQA-EM1969)

Established the 'Japan Toho Chemical Industry Co., Ltd. Shanghai Representative Office' in Shanghai, China

Acquired the sales and research divisions of subsidiary Kindaichi Chemical Industry Co., Ltd.

Expanded electronic information material manufacturing equipment at Chiba plant

Reorganized the Shanghai Representative Office in Shanghai, China, and established Toho Chemical Trade (Shanghai) Co., Ltd. (now: consolidated subsidiary)

Constructed Kashima plant in the Kashima area (Kanesu City), Ibaraki Prefecture, and began manufacturing surfactants

Established subsidiary Toho Chemical (Shanghai) Co., Ltd. in Shanghai, China (now: consolidated subsidiary)

Established subsidiary Hezhou City Toho Chemical Co., Ltd. of Kaishuu Toho Chemical Co., Ltd. in Guangdong Province, China

Added surfactant manufacturing equipment at the Chiba plant.

Added electronic information material manufacturing equipment at the Chiba plant.

Commercial production commenced at subsidiary Toho Chemical (Shanghai) Co., Ltd.

Commercial production commenced at subsidiary Hezhou City Toho Chemical Co., Ltd., a subsidiary of Toho Chemical Ltd.

Added purification equipment for electronic information materials at the Chiba plant.

On March 18, 2018, our company celebrated its 80th anniversary. We sincerely thank all our business partners and stakeholders for their long‑term support and goodwill.

On March 18, 2018, our company celebrated its 80th anniversary.

Added purification equipment for electronic information materials at the Chiba plant.

Absorbed subsidiary Toho Chemical Warehouse Co., Ltd.

Added second-phase production equipment at subsidiary Toho Chemical (Shanghai) Co., Ltd.

Constructed a resin manufacturing facility for electronic information materials at the Chiba plant.

Transitioned from the Second Section to the Standard Market following a review of the Tokyo Stock Exchange market classification.

Obtained ISO 45001 certification (JQA-OH0405).