Tosoh’s Bromine-Related Historical Materials Certified as Part of Japan’s Chemical Heritage

Tokyo, Japan—Select items belonging to Tosoh Corporation in relation to the history of bromine in Japan have been recognized under The Chemical Society of Japan’s 12th Chemical Heritage. The bromine-related items are valued for telling the history of bromine production in resource-poor Japan to the present day. Four items from Tosoh Corporation, Japan’s largest producer of bromine, have been certified under The Chemical Society of Japan’s designated heritage classification:

Bamboo filling material for bromine separation and concentration equipment (the cut bamboo in the display below is not subject to certification) Album depicting the repair of a bromine production facility
磁製臭素容器.jpg Porcelain blueprint.JPG
Porcelain bromine container Drawing of porcelain bromine container

Tosoh’s Nanyo Complex, in Shunan City, Yamaguchi Prefecture, has preserved and made available for public viewing the above items which includes actual bamboo filling material used in the bromine production equipment that operated at the Nanyo Complex from 1961 to 1973. They join a bromine distillation column and porcelain bromine container owned by Tosoh Group company Manac Incorporated. All of these items are designated under Certified Chemical Heritage No. 056, “Bromine Production Facilities and Porcelain Containers Using Bittern and Seawater as Raw Materials.”

Bromine mass production in Japan began in 1941. Tosoh was one of the chemical companies who produce bromine as a raw material for an additive in antiknock agents for aircraft fuel. The technical challenge at the time was finding a suitable filling material for the equipment used in the production of highly acidic bromine. Tosoh Corporation (then Toyo Soda Manufacturing Co., Ltd.) chose bamboo as its filler, which it initially was told would have a life span of only six months at most. Tosoh, however, found that the bamboo lasted for more than 10 years. And that contributed to the company’s stable production and supply of bromine.



Tosoh Corporation is the parent of the Tosoh Group, which comprises over 100 companies worldwide and a multiethnic workforce of over 12,000 people and generated net sales of ¥786.1 billion (US$7.2 billion at the average rate of ¥108.7 to the US dollar) in fiscal 2020, ended March 31, 2020.


Tosoh is one of the largest chlor-alkali manufacturers in Asia. The company supplies the plastic resins and an array of the basic chemicals that support modern life. Tosoh’s petrochemical operations supply ethylene, polyethylene, and functional polymers, while its advanced materials business serves the global semiconductor, display, and solar industries. Tosoh has also pioneered sophisticated bioscience systems that are used for the monitoring of life-threatening diseases. In addition, Tosoh demonstrates its commitment to a sustainable future in part by manufacturing a variety of eco-products.

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For more information, please contact


Gina Lau
International Public Relations
Tosoh Corporation 

[email protected]
Tel: +81 3 5427 5118
Fax: +81 3 5427 5198