a family friend ( lived in Tokyo for several months ) once said to me some Japanese dwellings don't have in-home shower and local ordinary folks take daily bath at a nearby public bathhouse.
A close relative of mine was working in Tokyo for several months in the mid-1980's also said there was no shower at the place where he stayed,and took daily bath at a neighborhood Sento.
I am in middle of watching this 2006 Japanese TV series Sento no Musume starred Mari Yaguchi,an orphaned young adult searching for her step-father who runs a neighborhood Sento in Tokyo.
This native Japanese tradition is preserved and thriving as individually-operated private enterprise with a modern touch.