Showa Chemical Industry. 

Showa Chemical Industry Co., Ltd. manufactures and sells diatomite and perlite filter aids under the Radiolite trademark and Topco brand in China and Japan. Its diatomite and perlite filter aids are used to remove particulates from liquids and gases; and diatomite filter aids are used in liquid filtration applications. The company also provides functional additives for use in coatings, agricultural chemicals, and other industrial products. It is also engaged in chemical product distribution; and solar power generation, as well as provides bathroom design services. The company's products are also used in the manufacture of building materials, silicone resins, and soil conditioners, as well as in incinerator exhaust filtration. Showa Chemical Industry Co., Ltd. was founded in 1930 and is headquartered in Tokyo, Japan.