MIYOSHI SOAP Inc. is a Japanese detergent manufacturer founded in 1921. Located in Sumida Ward, Tokyo, it produces pure, additive-free soap using only water and soap base. Committed to being additive-free, it uses absolutely no fragrances, colorants, or preservatives. Its diverse product line includes body care, kitchen, and laundry items, such as creamy lather hand soap, body soap, facial cleansing soap, bar soap, baby soap, and soap shampoo. Committed to sustainability, it uses RSPO-certified ingredients and biomass containers to reduce environmental impact. Manufacturing employs the traditional kettle-boiled saponification method, focusing on creating products gentle on both skin and the environment.