The toilet required an instruction manual, some of which is printed on the seat in Japanese. The three lower buttons control washing water. Small rods protrde from the back implementing a bidet and a butt washer. The larger dark grey section controls water pressure for these washing functions. The next grey section controls temperature for the washing water and the temperature of the heated seat. The seat and cover incorported hydraulic damping so there are no nasty noises of the toilet seat or cover dropping. This truly shows the sophistication of the culture. These seats were common, not just in our fancy hotel.