Basic Onsen (hot springs) Rules
Here are some basic rules to remember.
In the first place, completely undress in the locker room before entering the bathing area. Each locker is provided with a numbered key supplied by the reception.
Before entering the communal bath, ensure that your body is washed. Use the facilities provided. Rinse off any remaining soap before entering the water.
The large communal bathtub is not for washing your body, and any towels should not be immersed in the water. The onsen experience should be a time of tranquility and relaxation. You are requested to speak quietly.
Vary the temperature of your onsen, by alternating between hot or tepid or even cold water, respectively. The cooling down process is a part of this experience. Take your time, look at the view of the mountains from the bath windows, for instance, or any views if in an open bath.
In fact, there are a number of ways in which to enjoy your onsen experience; e.g. a sauna.
Before re-entering the locker room, ensure your body is completely dry.
And finally, relax, and enjoy this wonderful aspect of Japanese culture, so long cherished!
Please note that in some instances, there are small-sized baths for family or private use, offered at additional cost.
Some onsen may provide facilities in the form of a package—bathing, meals, in-house clothes set, and a private room for relaxation, all at inclusive cost.
Some hotels and inns offer the experience of a day trip to a hot spring (onsen) without the need for an overnight stay.

