Japanese make use of their baths not just to become clean but to take care of their health by warming up and encouraging their circulation. As people wash outside the bath, the bath water remains pure and extremely refreshing. 
In communal baths, everyone bathes in the same water, making a naked companionship, which encourages friendly communication. When in a bath, you may relax, recuperate from tiredness and get rid of stress. For that very reason, Japanese like their baths.
Do not immerse at once up to your shoulders. Slowly lower yourself into the bathtub. Diving is forbidden, since the Onsen (Japanese thermal source) is not a pool.
If you immerse all immediately in the water, strong water pressure will press the entire body that may hurt your heart and, besides, the splashes will irritate other visitors. Place your feet in cautiously and immerse up to the height of your body. When the half of your body has got warm, it is high time to immerse up to your shoulders.
Japanese are keen on immersing in the tub. In accordance with the survey data, 88% of Japanese like taking baths. Japanese bathroom is a separate from the toilet room, where the tub is submerged halfway into the floor. As the bath water is just utilized for immersing and not washing, all family members use it in turn. You should wash in the area outside of the bathtub; do not come to bath unclean or wash in
the bath water. Towels in the bath are forbidden as well.
• Wash your body outside the tub. Make use of a wash basin to ladle hot water out of the bathtub to clean you with.
• Get in the bath. The temperature of the water should not be higher than 42°C and the water must be deep enough that a grown-up might sit sunk up to the neck.
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