Sengokuhara Shinanoki Ichinoyu — Hakone's best-value in-room onsen ryokan
Picture this: soaking in your own private open-air onsen on the balcony, surrounded by the greenery of Sengokuhara forest — and paying roughly half what other in-room onsen ryokans in Hakone charge. That is Sengokuhara Shinanoki Ichinoyu. With a Booking score of 8.9 from 693 reviews and Trip.com 9.2, modern wood interiors, futon on tatami, staff scoring 9.2, and kaiseki dinner already included in the price, this is the ryokan guests come back from saying "best value in Hakone."
The question travellers ask most before a Hakone trip is "is there an in-room onsen that isn't astronomically expensive?" — and the answer that comes up most often from people who have actually been is Sengokuhara Shinanoki Ichinoyu. Located in Sengokuhara, a quieter pocket of Hakone set away from the bustle of Hakone-Yumoto, the ryokan sits within lush forest scenery that is hard to find in any city. Getting here requires a Hakone Tozan Bus or the ryokan's own shuttle service on select runs — plan the journey in advance and it's perfectly straightforward.
"Beautiful wood room, soft futon, the in-room onsen was very relaxing, staff were kind and attentive, kaiseki was delicious — so many guests say they want to come back again."
What makes this ryokan stand apart is the in-room onsen offering that doesn't sit at the top of the price tier alone. Rooms with a private open-air onsen on the balcony start at ¥45,000 — compared with in-room onsen ryokans elsewhere in Hakone that typically cost far more, this represents serious value for the experience delivered. Do be aware, however, that these rooms are limited in number; if you want one, book well ahead.
The design of Sengokuhara Shinanoki Ichinoyu blends traditional Japanese character with a clean contemporary sensibility — warm-toned natural timber finishes throughout, carefully crafted details, and futon sleeping on tatami floors that deliver the authentic ryokan feel while remaining spotlessly maintained. Multiple guests mention the rooms photograph beautifully and look quite unlike typical hotels at a similar price point.
On food — kaiseki dinner is included in the room rate and is consistently praised for both value and the genuine kaiseki quality it delivers, rather than a generic buffet experience. Breakfast is also included, so you start the day well fed without needing to search for options outside — which matters in Sengokuhara, where dining choices nearby are more limited than in the areas around the main stations.
The sub-scores that stand out are Staff at 9.2 and Wi-Fi at 9.2 — two areas that are often weak points at smaller ryokans, but here perform above average. International guests note that communication was smooth, that staff were genuinely helpful, and particularly good at organising shuttle times and recommending local spots. Another point that families appreciate is that children are welcome, with family rooms available — making this an accessible choice for parents wanting to introduce their children to the ryokan experience for the first time.
One thing to factor in is the location — Sengokuhara is away from the main stations, and the sub-scores of Value 8.3 and Location 8.3 reflect this honestly. That said, if you are already planning to use a Hakone Free Pass to explore the area, this inconvenience largely disappears, because most people come to Hakone to rest and enjoy nature rather than to hop between transport connections.
In short, if you want to experience an in-room onsen ryokan for the first time without spending a small fortune, Sengokuhara Shinanoki Ichinoyu is the most sensible choice in Hakone — a score of 9.0 from 693 Booking reviews and 9.2 on Trip.com says more about how guests feel after staying here than any description can.
Summary from Booking & Agoda
- ✓ Most accessible price for an in-room onsen in this group
- ✓ Modern wood design + futon on tatami — authentic ryokan feel
- ✓ Staff score 9.2 — attentive and communicative
- ✓ Kaiseki dinner + breakfast included — excellent value for this tier
- ! Far from train stations — requires bus or shuttle
- ! In-room onsen rooms are limited in number
- ! Value 8.3 · Location 8.3 in sub-scores
- ✓ Children welcome + family rooms available — ideal for first ryokan trip with kids
- ✓ Wi-Fi score 9.2 — better than average for a ryokan
- ✓ Peaceful atmosphere surrounded by Sengokuhara nature
- ✓ Booking 693 reviews + Trip.com 9.2 — high volume, trustworthy signal
- ! Shuttle only runs on select schedules — plan timing in advance
- ! Shared onsen can be busy during peak periods (hydrangea season / long weekends)
- ! Standard rooms do not all include a private onsen — specify at booking
- 💡If you specifically want an in-room onsen — these rooms are limited → book well ahead (at least 4–8 weeks), especially during peak season, and be explicit about the room type when reserving.
- 💡If you are travelling without a car — the property is in Sengokuhara and requires the Hakone Tozan Bus or shuttle → check shuttle schedules with the ryokan at booking time and plan your itinerary accordingly.
- 💡If you are travelling with young children — the ryokan welcomes children and has family rooms → inform the property in advance so they can prepare the right setup for your group.