the area's full of wild macaque. they can appeared in the onsen whenever they want, however they won't. best chance was in the winter, like us they do the hot spring to lessen the cold.
and NO. you aren't able to bathe with them.
the onsen monkey of Jigokudani valley in Japan's one of the most famous wildlife in the world.
'Onsen' the japanese word. Well known as a japanese hot spring bathe,
definitely to cleanse the body. However the japanese belief it can be purify the soul as well, in this image I've try to represent that idea. the challenge aren't just try to get the eye contact. but to get the 'purified' innocent eye contact as well.