Yamanakako Onsen

Mountain resort town in Fuji-Hakone-Izu National Park, with Hakone-Yumoto, Miyanoshita, Gora, Sengokuhara and a dozen more sub-areas spread across the caldera.

Quiet Kanagawa onsen in the foothills of the Hakone outer rim, on the Manyōshū-era list of historic baths. Plum blossoms in February.

Seaside city on the Izu Peninsula, an hour from Tokyo by Shinkansen. Coastal sodium chloride springs; fireworks over Sagami Bay in summer.

A hot-spring town on the central Izu plain, joining the ancient Kona spring — named in the Azuma Kagami and tied to the Hōjō clan — with Meiji-era Nagaoka. Gentle alkaline "beauty water," Mt. Katsuragi's Fuji-and-Suruga-Bay views, and the Genji history of nearby Hirugakojima.