This tour takes you on a trek across the forested edge of the Shirakami Sanchi, a mountainous area designated as a UNESCO World Heritage Site. Tomeyama is a hill with an elevation of 160–180 meters that is a rare place in Japan as it maintains its original broadleaf forest (mostly beech trees). You can see Japanese oak and beech trees, some of which are over three centuries old. To protect the forest, all visitors must be accompanied by a guide from the Happo Shirakami Guide Association. After the trek, enjoy an unobstructed view of the Japan Sea while soaking outdoors in boat-shaped and rock-formed onsen baths. Please note that the Tomeyama trekking tour is not held between late November and early May due to snow.