Nagominoyado Hanagokoro Review: A Private Onsen Ryokan in Hakone's Gora
Hakone is one of Japan's most popular onsen destinations. I visited in August, and the timing turned out to be one of the best decisions of the trip.
While Tokyo and Yokohama were sitting at 35°C, Gora — where Hanagokoro sits at 800 metres above sea level — was noticeably cooler. Not cold, but the kind of temperature where you can actually breathe. If you're visiting Japan in summer and dreading the heat, Hakone is worth considering for exactly this reason.
I stayed one night at Nagominoyado Hanagokoro, a small ryokan with only 8 rooms. Here's what it was like.
About Nagominoyado Hanagokoro
Hanagokoro is a quiet, adults-only ryokan in Gora, one of Hakone's most elevated areas. It's small by design — 8 rooms, each different, each with its own private outdoor bath.
The rooms are traditional Japanese in feel — tatami flooring, low furniture, clean lines — with a proper bed. Mine was spacious and well-kept, with views of the Hakone outer mountain range. Nothing flashy, but the kind of room you settle into easily.
Staff spoke English, which made check-in and dinner straightforward. The pace of the place is deliberately slow — no large lobby crowds, no tour groups. Just the sound of birds in the morning and the smell of hot spring water.
The Food
Dinner is kaiseki — a multi-course Japanese meal where each dish reflects the season.
Kaiseki is not a fixed menu. The dishes change monthly, built around whatever is freshest. At Hanagokoro, that means vegetables from the Hakone Nishiroku highlands and seafood from Sagami Bay and Suruga Bay — both within an hour of the ryokan.
What I ate in August won't be what you eat in October. That's the point.
The Onsen — Gora's Natural Hot Spring
The hot spring water at Hanagokoro comes directly from the Gora source — 100% natural, unfiltered, flowing straight from the ground (kakenagashi). The water is milky white (nigori-yu), which reflects the high mineral content.
The spring is classified as an acidic calcium-magnesium sulfate-chloride spring, with a source pH of 2.9. That puts it in the strong acidic range. In practical terms, this is not a gentle spring — you'll feel it on your skin.
The three overlapping mineral properties each contribute something different:
- Acidic: Strong antibacterial effect. Associated with chronic skin conditions and promoting skin cell turnover.
- Sulfate: Improves circulation. Traditionally called kizu no yu — "water for wounds". Also linked to anti-aging effects.
- Chloride: Retains heat after bathing. You stay warm longer — good for fatigue recovery and cold sensitivity.
How to bathe in this water:
Because the water is acidic and mineral-rich, a few things are worth knowing before you get in.
- Don't wash with soap before entering — it strips the natural oils your skin needs during the soak
- Keep sessions to around 10–15 minutes, especially your first time
- Rinse off with fresh water when you get out to remove the acidic residue
The Private Open-Air Bath
This is the main reason I chose Hanagokoro over other ryokan in the area.
Each of the 8 rooms has its own dedicated outdoor bath — not shared, not bookable by time slot. It's yours for your entire stay. The bath is a short walk from your room, in a separate structure within the 2,200-tsubo grounds.
Some baths sit in the forest. Others have open views of the outer mountain range. Which one you get depends on your room — worth checking when you book if you have a preference.
I went in at 10pm and again at 6am. Both times, completely alone, surrounded by trees. That's the kind of experience that's hard to find at larger ryokan.
Is Hakone Worth Visiting in August?
If you're used to thinking of onsen as a cold-weather activity, August in Hakone might surprise you.
Gora sits at around 800m elevation. On a hot summer day, the temperature difference from central Tokyo can be 5–8°C — enough to make outdoor walking comfortable and an open-air onsen feel like genuine relief rather than extra heat.
The summer crowds at popular spots like Hakone-Yumoto can still be heavy, but a ryokan stay in Gora is self-contained. You're not there to sightsee. You're there to slow down — and the heat of the season makes the milky white water feel even better when you finally sink in.
How to Book
The ryokan has only 8 rooms, so it fills up quickly on weekends and during Japanese public holidays. Weekday stays tend to be easier to book and a little cheaper.
Where to stay
Nagominoyado Hanagokoro
8 rooms · Private outdoor onsen · Adults only
Check availability on Agoda →Quick Tips
- Getting there: Free shuttle from Gora Station (15:00–18:00, reservation required). Or 3-minute walk from Hayakawa Cable Car Soun-zan Station
- Check-in / Check-out: 15:00 check-in / by 11:00 check-out
- English: Staff spoke English during my stay
- Meals: Dinner and breakfast included in most plans, served in your room
- Price: From around ¥27,000 per person (varies by plan and season)
- Before you visit: Opening hours, prices, and onsen rules may change — confirm via the official website or Agoda listing