Shichirin is made from high-quality diatomaceous earth mined in Ishikawa Prefecture. Diatomaceous earth mined in Ishikawa Prefecture is a natural material that is the result of 12 million year old dead phytoplankton. Shichirin made of diatomaceous earth, which is highly heat-resistant, is ideal for cooking with charcoal, which cooks with strong infrared heat, because it keeps the heat in.
Neri Shichirin is made by crushing this diatomaceous earth and kneading it into a mold. The material is transported efficiently, and the use of molds is excellent for producing high quality products.