Definition of Ashiyu
Ashiyu means footbath. They are commonly found at larger sento, often in the bathing area, or right outside the building of many onsen. The ashiyu is only meant for feet, and trying to sit down in the fairly shallow water might result in stares. When found outside the building of an onsen the ashiyu can be used by any passer-by and bathers only need to take off their shoes and sit down with their feet in the water.