Namari Onsen is in the labyrinthine complex of the Fujisan Ryokan (藤三旅館), the highlight of which is the White Monkey Bath (白猿の湯), a 1.4 meter deep, wonderfully hot oval of konyoku perfection with a rough, natural bottom and tiled sides. A small lip at the edge lets one ease in. Though konyoku (mixed gender) the White Monkey Bath has Ladies only hours, so pay attention to the signs outside the entry doors.