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Plants locations

No.1 share of Diatomite Filter aids in Japan!

Plant locations

Akita Plant / Akita#2 Plant

Located in Akita Prefecture in northeast Japan, the Akita plant is the only marine diatomite ( Diatomaceous earth ) plant operating in Akita. One notable characteristic of diatomite ( Diatomaceous earth ) found in Akita is its especially fine particle size, which is suitable for producing calcined filter aids for high clarity to flux-calcined filter aids for high-speed filtration, and filter use for use in silicone rubber manufacturing. The Akita plant was ISO9001:2000 certified in 1999 as part of our efforts to ensure consistent quality for our customers.


Oita Plant

The Oita plant, located on Kyushu island manufactures both Radiolite filter aids and filter products form 500,000-years-old freshwater diatomite ( Diatomaceous earth ) .
Fillers produced in Oita have a high degree of whiteness.
Our filler, have found wide range applications for the manufacture of paper, rubber plastic, dental impression materials, and paint of our efforts to ensure consistent quality for our customers.


Okayama Plant

The Okayama plant, located on the main Honshu island, was the first plant established by showa chemiacal Industry having started production in 1933. It is also the largest diatomite production facility in Japan in Okayama, Radiolite products are manufactured from 100,000-years-old freshwater diatomite ( Diatomaceous earth ) , which provides an extremely complex and highly porous geometry, and low density compared to other diatomite ( Diatomaceous earth ) available in the world. With some particles as large as 100um, and low density Okayama products are suitable for a wide variety of applications, form high-speed filtration to heat resistance or heat retention. The Okayama plant was IS09001:2000 certified.


China – Bai Shan plant

Located in Jilin Province, Showa’s China plant is located at the heart of the rich diatomite deposits of Changbaishan mountain range, and produces production started in 2010 with capital investment from Showa Chemical Industry. The Bai Shan plant is now fully integrated into Showa’s global sourcing strategy, and the same strict quality control system is in place as the one we implement in our Japan plants. Our Chinese products are suitable for a wide range of filtration applications. Bad plant was ISO9001 certified.




Techno gateway Co. Ltd. is Distributor of Showa chemical industry co., ltd.