Onsen - Hot Spring Bath
You should try the hot spring bath (onsen) . Women and men have separated bath. You must take off your clothes before you enter the bath area. It felt strange because I am not used to it, but that's the way it is. And before you get in the water, you had better have a shower to clean up yourself, so you enter the bath clean.
The water feels very hot at first but your body will adapt to it soon. It's recommended to cover your hair with a towel because the hot water may not be good for your hair.
I've Got a Complex
Some of the buildings are so whimsical that you think you are actually at a theme park and entering the lotus blossom tea cup ride or some such nonsense. This building contains a mausoleum to Japan's third Shogun Tokugawa Iemitsu. Not to be confused with Tokugawa Ieyasu. Iemitsu was the grandson.
This is a much more relaxing color scheme - simple red. Futarasan-jinja was built in honor of the volcano that created the nearby Chuzenji-ko or Chuzenji Lake. The innermost shrine stands on top of the mountain. What a venerated position.
Looking for spiritual enlightenment, making a wish, honoring the dead, ringing in the new year - the Japanese visit and attend the temples and shrines around their country on a regular basis. Some are more famous, like Nikko, and therefore more crowded but all are a regular part of the life of the community in which they are situated.