Right Onsen › Kanagawa › Baths fed straight from the source, not recirculated
Free-flowing (kakenagashi) onsen in Kanagawa
17 baths in Kanagawa. Gensen kakenagashi means spring water flows through the bath and out again, rather than being filtered and returned. Where reviewers disagree, the bath is listed as partly free-flowing on its own page instead of here.
Atsugi · Some baths are labeled as source-fed (kakenagashi), though one reviewer questioned whether the heated bath truly qualifies given the low natural source temperature (2026-05 to 2026-06).
Day visitors: Yes · Outdoor bath: Yes · Sauna: YesEbina · Most 2026 reviewers describe the bath as genuine kakenagashi chloride spring, though one 2026-05 review claimed the source was heated and no longer truly flowing.
Day visitors: Yes · Outdoor bath: Yes · Sauna: Yes · Tattoos: Not allowedSagamihara · Several visitors described the source-spring baths as unheated-source kakenagashi and not diluted, though the baths are also chlorinated.
Price: ¥780 · Day visitors: Yes · Outdoor bath: Yes · Sauna: YesYokohama · Some reviewers described the water as genuine flowing hot-spring water (kakenagashi), while one 2026 review claimed the bath was actually a recirculated, non-kakenagashi bath.
Price: ¥1,200 · Day visitors: Yes · Outdoor bath: Yes · Sauna: YesYokohama · Multiple reviewers describe the outdoor bath as genuinely source-fed (kakenagashi).
Day visitors: Yes · Outdoor bath: Yes · Sauna: Yes · Tattoos: Not allowedHakone · Reviews from 2026-03 to 2026-07 explicitly state source water is run-through without recirculation, heating, additional water, or chlorination.
Price: ¥900 · Day visitors: Yes · Outdoor bath: Yes · Payment: Cash onlyHakone · Multiple reviews explicitly state the bath features fresh source-water flow.
Price: ¥650 · Day visitors: Yes · Outdoor bath: NoYugawara · Reviews from 2026-01 and 2025-07 confirm spring-water flowing baths (kakenagashi); guest-room baths are heated with added water but communal baths include flowing spring water.
Price: ¥1,870 · Day visitors: Yes · Outdoor bath: YesHakone · Reviews from 2025–2026 confirm source water flow; one reviewer notes this is weekday-only practice.
Day visitors: Yes · Outdoor bath: Yes · Sauna: No · Tattoos: Private bath onlyHakone · Multiple baths operate on direct source-flow 24 hours; visible hot-spring flowers confirm flow.
Price: ¥2,000 · Day visitors: Yes · Outdoor bath: YesYokohama · Visitors describe the black spring water as flowing continuously (kakenagashi) rather than recirculated.
Price: ¥570 · Day visitors: Yes · Sauna: YesHakone · Explicitly described as 100% spring-fed flow-through with no recirculation or additives; baths are drained nightly, cleaned, then refilled with spring water in the morning.
Price: ¥600 · Day visitors: Yes · Outdoor bath: No · Sauna: NoYugawara · Multiple reviews confirm (direct source flow); operator stated no water added, source at 81–86°C reduced to bath temperature by adjustment, not dilution.
Price: ¥300 · Day visitors: Yes · Outdoor bath: No · Tattoos: AllowedHakone · Multiple reviews confirm hot spring water flows directly without recirculation (kakenagashi).
Price: ¥650 · Day visitors: Yes · Payment: Cash onlyOdawara · The spring water flows continuously (kakenagashi) without recirculation.
Price: ¥500 · Day visitors: YesHakone · Explicitly described as source water flowing by multiple visitors (2020–2023).
Price: ¥1,500 · Day visitors: Yes · Outdoor bath: YesHakone · Visitors reported free-flowing hot spring water in 2022 and 2016; one noted healing sounds of the flowing water.
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