Izu-Nagaoka Onsen is a well-known hot spring area in Izunokuni, on the Izu Peninsula in Shizuoka Prefecture. It has long been one of the region’s established onsen towns, with traditional inns and bathhouses gathered in a setting that feels quieter and more lived-in than some of Japan’s larger resort destinations.
For travelers exploring Izu, it makes an easy base for slowing down and settling into the rhythm of the peninsula. The town is less about spectacle than atmosphere: local streets, classic ryokan, and the simple appeal of soaking in hot spring water after a day spent moving through the surrounding area.