Contains horse oil from Kumamoto. A small amount is included. Handmade by artisans. Recommended as a starting point for gentle, foamy hand treatment! Bisou Original Handmade Silk Soap Wrapping Sumi Sericin, contained in silk, includes ingredients very similar to the skin's natural moisturizing components. Using silk as a base, we combined it with specialty products from Yamaga City, Kumamoto, such as local sake, horse oil, mulberry leaves, and honey, to create Bisou's unique handmade soap. Smooth yet moisturizing. You'll be satisfied with the feeling after washing. Made by hand, one by one, by artisans, primarily using silk (moisturizing ingredient) extract from Yamaga, Kumamoto, and horse oil. The gentle foam unique to silk gently removes dirt from your skin.