The first toilet I had in Japan was just a plain toilet but one thing about it was that it had a little wash basin over the tank where you could wash your hands

The first toilet I had in Japan was just a plain toilet but one thing about it was that it had a little wash basin over the tank where you could wash your hands as the tank was re-filling. Logically I could see it as being efficient and environmentally friendly but I just never could get over the idea of using toilet water to wash my hands so I never used it (i did wash my hands, just not with the toilet water). Another takeaway - the bath that fills itself up at the exact temperature you specify and calls out to you when it is ready.