Kanagawa · Hakone Onsen
Hakone-Yumoto Tenseien (day use)
箱根湯本温泉 天成園（日帰り）
A large day-spa 12 minutes from Hakone-Yumoto Station, open 23 hours (10 am to 9 am). A 17-metre rooftop open-air bath, garden waterfalls and private baths. Overnight stays cost extra.
- Price (adult)
- ¥2,730
- Hours
- 10:00–09:00 next day (23 hours)
- Closed
- Open daily (closes for maintenance)
- Access
- 12 min walk from Hakone-Yumoto Station (shuttle available)
- Water type
- Alkaline simple
- Tattoos
- Not allowed
- Admission
- Adults (junior-high+) ¥2,730 + ¥50 bath tax / elementary ¥1,320 / ages 3+ ¥990. Covers 5 hours, then ¥100 per 30 min; late-night surcharge (¥1,650 adults) if you stay past midnight. Odakyu Travel advance ticket ¥2,180
- Springs
- Four private sources on site feeding the rooftop “Tenku” open-air bath (~17 m long), indoor baths and family baths
- Mixed bathing
- Children up to preschool age may accompany a parent of the opposite sex (Kanagawa rule)
- Facilities
- Restaurant (L.O. 20:00), tatami rest hall, 24-hour kids’ room (ball pit) on 1F, relaxation. Adjacent Tamadare Falls and shrine open for strolling
- Phone
- 0460-83-8511
- Official site
- tenseien.co.jp ↗
- Open in Google Maps
- Google Maps ↗
Essentials
Stay in this onsen town
Compare and book stays in Hakone Onsen. Day bathing itself needs no booking.
Opens partner booking site (affiliate)
Why go
- Rooftop 'sky' open-air bath
- Open 23 hours a day
- Private baths and a kids' room
Hakone’s first 23-hour onsen
Tenseien is the largest ryokan in Hakone-Yumoto and the only place in Hakone taking day bathers for 23 hours, from 10 a.m. to 9 a.m. the next day. Four private springs on site feed the rooftop “Tenku” open-air bath (~17 m) with views of the Hakone mountains through the night; travellers who miss the last train sometimes spend the night in the tatami hall. The garden has the 11-m-wide Tamadare Falls and a branch of Hakone Shrine, a pleasant stroll before or after your soak.
Tips & cautions
- Beyond the basic 5 hours it is ¥100 per 30 min, plus a late-night surcharge after midnight — using it as lodging costs adults roughly ¥4,400+.
- Advance tickets (Odakyu Travel, Asoview) are ¥500–600 cheaper than the ¥2,730 gate price; meal + rest-hall sets exist.
- The rooftop bath is exhilarating but cold to reach in winter and sunny at midday.
- Some plans exclude towels and loungewear — check when buying.
- Very crowded on weekend afternoons; evenings and early mornings are quieter.
Getting there
About 12 min on foot from Hakone-Yumoto Station (gentle climb along the Sukumo River) or ryokan loop bus route A ~5 min to “Tenseien”. By car ~5 min from Sukumogawa IC; free parking.
Before you go
- Tattoos are explicitly not allowed, even if covered.
- Ryokan day-use hours are limited and may be suspended in peak season — phone the same morning.
- Last entry is 30–60 minutes before closing.
Features
Sauna & wellness
Rules & private
Who with
Mood & scenery
Amenities
✔ Verified operating: 2026-09 Operating status and rates cross-checked against the official site and onsen guides (full source notes in Japanese on the JA page)
Prices and hours change. Check official sources before visiting.
More in this area
Tenzan Tohji-kyo
Five minutes by shuttle from Hakone-Yumoto Station, a day-use-only bathhouse in the hills along the Sukumo River. Terraced rock rotenburo, a cave bath and a lukewarm pool invite long soaks. No reservation needed; rest rooms, restaurants and a reading lounge make it easy to stay half a day. Tattoos not permitted.
Hakone Kowakien Yunessun
Two halves: the swimsuit spa zone 'Yunessun' and the traditional nude 'Mori no Yu'. Wine baths, coffee baths and water slides make it family-friendly and an easy first onsen for visitors. Tattoos allowed if covered with a sticker. Dynamic pricing in 2026: passport (both zones) from ¥3,500, swimsuit zone from ¥2,500, Mori no Yu only from ¥1,500.
Hakone Yuryo
Three minutes by free shuttle from Hakone-Yumoto. A farmhouse-style day spa whose 19 private open-air rooms are the draw (reserve ahead). The löyly sauna sessions in the main bath are popular too.
