1. Hakone Onsen — Hakone, Kanagawa
The easiest onsen town from Tokyo, with ryokan, day-use baths and Lake Ashi views.
Hakone is a mountain resort area with a dozen hot spring districts, from Hakone-Yumoto at the base to Gora, Sengokuhara and Lake Ashi higher up. It has ryokan at every price level and many day-use baths, and it pairs hot springs with sightseeing at the Hakone Open-Air Museum, Owakudani and the lake.
Because it is so close to Tokyo, it is the best first onsen trip for visitors who are short on time.
Good to know: Odakyu's Romancecar from Shinjuku reaches Hakone-Yumoto in about 80 minutes. The Hakone Free Pass covers local trains, buses, the ropeway and Lake Ashi boats. Check each bath's tattoo policy before you go.
Hakone-Yumoto Station, Yumoto, Hakone, Ashigarashimo District, Kanagawa 250-0311