From WATO.

Yakuto 薬湯

During a bath, the combination of water pressure, heat, and buoyancy releases fatigue from tired muscles and promotes blood circulation throughout the body. We have created an herb blend designed to moisturize and detoxify. Simply place the pouch inside your bath and enjoy. The same pouch can be steeped up to 2 times.

*Lotus leaf is a classic skin cleanser in Asia that has been used for centuries.