The upper limit of the bathing fee is decided and specified by each prefectural governor pursuant to the provisions set forth in the Price Control Ordinance (which was proclaimed before the proclamation of the current Constitution and has the same binding effect as the law).
なお、入浴料金は物価統制令（現憲法発布前に出された勅令。法律としての効力を持つ）の規定により、各都道府県知事の決定で上限が定められる。