Hakone Suimeisou is a hot-spring inn in Hakone-Yumoto, a few minutes on foot from Hakone-Yumoto Station. The inn says every room looks down on the Hayakawa River, and its rooftop open-air bath faces the woods of Soun-ji temple. Before you book, three things matter: only the rooms with an open-air bath have hot-spring water in the room; check-in runs 14:00 to 18:00 on dinner plans; and there is no early check-in or late checkout.
Hakone Suimeisou at a glance
| Item | Official information |
|---|---|
| Address | 702 Yumoto, Hakone, Kanagawa |
| Nearest station | Hakone-Yumoto (Hakone Tozan Railway / Odakyu), a few minutes on foot |
| Check-in / out | 14:00–18:00 (22:00 without dinner) / 11:00 |
| Hot spring | Alkaline simple spring, pH 8.5, source 45.2°C |
| Private baths | Two, 2,200 yen for 50 minutes |
| Prices | Featured plans from 25,300 yen |
| Cards | Visa, Mastercard, JCB and others |
| Parking | 15 cars, free, no reservation |
| Phone from abroad | +81-460-85-5381 (08:00–20:00 Japan time) |
From the official site, booking page and Hakone town website, read October 20, 2026.
Which room should you choose at Suimeisou?
The choice comes down to one question: do you want hot-spring water in your room? Room sizes are given in tatami mats, not square meters. The main building’s rooms are non-smoking.
| Room type | Up to | In-room bath |
|---|---|---|
| Japanese room with open-air bath | 4 guests | Open-air bath (hot spring), shower booth |
| Japanese-Western room with open-air bath | 5 guests | Open-air bath (hot spring), shower booth |
| 12 + 6 mat room | 8 guests | Bath and toilet |
| 12.5 mat room | 7 guests | Bath and toilet |
| 10 mat room | 5 guests | Bath and toilet |
| 8 mat room | 4 guests | Bath and toilet |
From the official rooms page, read October 20, 2026.
The FAQ says the open-air baths in the rooms are 100 percent hot-spring water, while the baths in the regular Japanese rooms are heated tap water. If you book a regular room, the shared baths are where you get the onsen. There is also a separate annex, POSADA Suimei, with single rooms for room-only stays; you check in at the main building’s front desk.
The onsen at Suimeisou
Which baths are there, and when are they open?
The rooftop open-air bath, Tsukimi-no-yu, is for women from 8:30 to 21:30 and for men from 22:00 to 8:00. The two indoor baths, Tsuki-no-yu and Hoshi-no-yu, swap between men and women at set times: 14:00–18:30, 19:00–5:00 and 5:30–10:30. Overall, the baths are open from check-in to 10:30 the next morning. Bring your towel from your room; the large baths have lockers. The spring is alkaline, and the inn uses both free-flowing water and filtered recirculation.
Is there a private bath?
Yes, two: Shirasagi and Kawasemi. Each costs 2,200 yen for 50 minutes, from 15:00 to 22:00 and 7:00 to 9:00, and can be reserved in advance; ask the inn how.
Can I bathe with a tattoo?
The Japanese pages do not mention tattoos, so ask the inn before you book. Our tattoo and onsen guide explains what to ask. Day visitors cannot use the baths; they are for staying guests only.
Meals at Suimeisou
What are dinner and breakfast like?
Dinner is a seasonal kaiseki-style course. A sample summer menu runs from starters and sashimi to a hot-plate dish of Ashigara beef, rice and dessert. It starts between 18:00 and 19:00, in your room or a private dining room depending on your room and group size; ask the inn which applies to you. Breakfast starts between 7:30 and 8:30 and is Japanese, but you can ask in advance for a Western breakfast. If you stay several nights, the menu changes each night up to the third.
Can the inn handle allergies or a special diet?
The Japanese pages say the kitchen will do what it can if you tell it in advance, but some ingredients cannot be avoided, and special meals such as low-salt or finely chopped food are not offered. Vegan or religious menus are not mentioned. Contact the inn well before you arrive. You can order extra dishes, such as an Ashigara beef steak or a sea bream platter, 3 days ahead. Bringing your own food is not allowed.
Prices and rules at Suimeisou
How much does a stay cost?
On the official site, the featured plans start at 25,300 yen, 25,850 yen and, for an open-air-bath room, 31,350 yen; the plan details did not load, so check what each price includes on the booking page. Group plans with dinner and breakfast start at 18,700 yen per person on weekdays. A room-only single at POSADA is 8,650 yen on weekdays and 10,350 yen before holidays.
Hakone’s bathing tax is 150 yen per person per night, and the town website lists children under 12 as exempt. See our onsen bathing tax guide.
What do children cost?
The booking page has separate rates for older and younger elementary pupils and for infants. The inn lends one baby crib with bedding for 2,200 yen, children’s yukata are 330 yen, and staff will warm baby food. There is no stroller to borrow, and one wheelchair is available.
What is the cancellation policy?
The inn’s website does not state one, and the plan details did not load for us. Check the rule on your plan before paying; our hotel cancellation guide explains what to look for.
How do I pay?
The Japanese FAQ lists credit cards such as Visa, Mastercard and JCB. Gift certificates are not accepted. At POSADA, you pay in full at check-in. If you plan to use another card brand, ask the inn first.
Getting to Suimeisou in Hakone-Yumoto
From Hakone-Yumoto Station, on the Hakone Tozan Railway and Odakyu lines, it is a few minutes on foot. From Odawara Station, the Hakone Tozan Railway takes about 13 minutes. The inn does not run a pickup, because the station is so close. Drivers can park free (15 cars, no reservation), but POSADA guests cannot use this lot and need a nearby coin parking. For what to do once you arrive, see our things to do in Hakone guide.
What foreign guests should know before staying at Suimeisou
- The English website is at suimeisou.com/english/, and the booking page has an English version.
- Arrive by 18:00 on a dinner plan.
- Only rooms with an open-air bath have hot-spring water in the room.
- Pets are not allowed.
- The front desk takes calls from 08:00 to 20:00 Japan time on +81-460-85-5381.
Frequently asked questions
What time is check-in at Hakone Suimeisou?
Do the rooms at Hakone Suimeisou have a private onsen?
Can I bathe with a tattoo at Hakone Suimeisou?
What is the cancellation policy at Hakone Suimeisou?
Is there a shuttle from Hakone-Yumoto Station to Hakone Suimeisou?
Bottom line (2026): Hakone Suimeisou is a river-view onsen inn steps from Hakone-Yumoto Station, with a rooftop open-air bath and two private baths. Book an open-air-bath room if you want hot-spring water in your room, and confirm the cancellation rule on the official booking page.
Sources
Every fact on this page is from Hakone Suimeisou’s official pages: home (Japanese), rooms, hot springs, meals, FAQ, access, POSADA annex, group plans and the English site, plus the official English booking page and the Hakone town bathing tax page. All were read on October 20, 2026. Prices and rules change; check the official site before you book.
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