Katase Onsen is a small hot spring area in Higashiizu, on the eastern side of the Izu Peninsula in Shizuoka Prefecture. Facing the sea, it has a quieter, more local feel than some of the region’s better-known resort towns, with a setting shaped as much by the coastline as by its inns and bathhouses.
For travelers exploring the Izu coast, Katase Onsen works best as a calm base rather than a place of big sights. The appeal is simple: time spent soaking, slow walks through a modest seaside town, and easy access to the broader landscapes of eastern Izu, where ocean views and everyday local rhythms tend to define the experience.
