As the others said - you get clean in the shower (or, traditionally, by sitting on a stool and washing yourself with water taken from the tub - not a tub really

As the others said - you get clean in the shower (or, traditionally, by sitting on a stool and washing yourself with water taken from the tub - not a tub really, a round or square relatively deep bath). When you're as clean as can be you sink your body into a very hot bath. With modern baths you can set the temperature to be exactly what you want. I'm fine with 41C, my wife (as can most Japanese) can manage hotter water and prefers at least 42C except in the summer - cooler is better then. The long hot bath every evening is vital.. Japanese houses are cold in the winter. No insulation, no bedroom heating, barely above freezing. If I don't take a bath at night I'll be so cold that I'll have trouble sleeping. But after a long bath I'm fine. Not feeling the cold at all and this lasts all night. Seems to help with my health too. No pains, colds are rare. Very much unlike like now, when I'm in my home country waiting for travels to open again.