Satori Japanese Plaster and additives are imported from Japan by Shikoku International Corporation which is based in Orange, CA. The products are stocked and shipped from our warehouse in Long Beach, CA. Shikoku International Corporation is a wholly owned subsidiary of the Shikoku Chemicals Corporation founded in 1947 and based on the island of Shikoku in Japan. The Housing Materials Operations began producing its first Japanese plasters in the 1970s and launched the Diatomaceous Earth series in 1999. 10. We are certified ISO 9001 : 2015 and ISO 14001 : 2015. The earth material used in our products has been carefully selected for quality and particle size consistency from around the globe. The earth particles are collected from areas in strict accordance with all regulations from land beneath the clay layer. Japanese plaster has been a centuries old tradition in homes, tea houses as well as commercial establishments and Shikoku International is proud to bring these beautiful wall finishes to the United States market.