Northwest of Naruko town, this 100m-deep gorge is particularly spectacular in autumn when the leaves change colour. Only some sections of the trail were open at the time of writing, due to landslides – check with the tourist office for maps and up-to-date trail information.

Another trail can be reached from Nakayama-daira Onsen Station, a short bus trip from Naruko Onsen Station (¥180, five minutes) or an easy, well-signed walk. This path also intersects with a 10km stretch of the old foot highway, walked by the haiku poet Matsuo Bashō, which is now a hiking trail.