JIS A 4422:1992

This Japanese Industrial Standard specifies the toilet seat with douche to wash anus with warm water of aqueduct direct-coupled water-supply type (working pressure of not more than 0.74 MPa(7.5 kgf/cm*2)) in which the warm water washing apparatus and the electrothermic toilet seat are built-in, and of pumping water supply type, hereinafter referred to as the \"toilet seat with douche\".