Kuro Falls on the north side of Mt. Kamuriki. From our onsen town Togura Kamiyamada, it’s a quick 10 minutes by car + 10 minutes on foot, and you go from 33 deg C down in town to at least 10 degrees cooler.
Misaki and I went for the waterfall shower with friends and guests from Germany.
Highly recommended for beating the heat this summer.