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6. Hakone Onsen — Japan

Close to Tokyo, Hakone pairs classic onsen culture with views of Mount Fuji when the weather cooperates. The region has many ryokan (traditional inns) that include private or public baths as part of the stay, which makes it a popular overnight escape from the city. Soaking in Hakone often follows sightseeing on the Hakone Ropeway or lakeside strolls, creating a balanced day of gentle activity and relaxation. Like other Japanese bathing venues, Hakone expects visitors to follow local etiquette: shower first, tie up long hair, and avoid noisy behavior. Seasonal considerations matter—autumn foliage and winter snow make baths especially atmospheric, while summer offers milder hiking conditions. Many properties now offer English guidance and private baths for travelers who want an easier introduction to onsen customs. If you’re sensitive to high temperatures, ask for baths with lower-temperature pools or outdoor options that let you control soak time.