I Looked Into Auberge Hakone Fontainebleau Sengokutei
2026-09-01
On Komorin's Imaginary Travels, I've mainly been looking into campsites and day-trip hot springs so far, but I also want to occasionally record some "what if I skip the tent and go for a staycation instead" detour options.
This time I looked into Auberge Hakone Fontainebleau Sengokutei, located in Sengokuhara, Hakone. I came across information saying all 13 rooms come with their own open-air bath with a view, and as someone who's pretty indoor-oriented, that caught my attention, so I looked into the details.
It seems like all 13 rooms come with an open-air bath with a view, fed continuously by natural Owakudani hot spring water, so it looks like you could enjoy the hot spring without ever leaving your room.
As for Rakuten Mobile signal, the official tool gave a rating of C.
I've put together the details below.
Apparently Every Room Comes with Its Own Open-Air Bath
Auberge Hakone Fontainebleau Sengokutei is apparently a lodging located in the Sengokuhara area of Hakone Town, Ashigarashimo District, Kanagawa Prefecture. Its big distinguishing feature seems to be that it has 13 guest rooms in total, and every single one comes with an open-air bath with a view, fed continuously by natural Owakudani hot spring water. Rather than a shared large bath or a reservable private bath, it sounds like the setup is built so that each room's own bath is the centerpiece of the hot spring experience.
The source is apparently a milky-white acidic spring, with a source temperature of 64.7°C and a pH of 2.9. Some rooms seem to have semi-open-air style windows that can be opened or closed depending on the weather, and being able to soak in your own room regardless of the season felt like a pretty appealing point for someone as indoor-oriented as me.
Room types are apparently divided into more than 10 categories, including Suite, Semi-Suite, Superior, Twin, and Double, ranging from 32 to 60 square meters. Every room reportedly comes with a private terrace and dining area. As for rates, the official booking system only shows specific prices once you specify dates, so I wasn't able to confirm exact figures. For reference, some accommodation booking sites listed prices in the range of roughly 38,000 to 50,000 yen per night for two people including dinner and breakfast, but this likely varies by season and plan, so checking the official booking system or calling directly seems like the safest way to get an accurate figure.
Check-in is apparently from 3:00 PM and check-out is at 11:00 AM, and due to cleaning schedules, check-in before 3:00 PM doesn't seem possible. If you're arriving after 5:00 PM you're asked to contact them, and arriving after 8:00 PM apparently makes it difficult to serve dinner at all, so if you think you'll be arriving late, it seems reassuring to confirm by phone in advance. Reservations can be made both through the official website's booking system and by phone.
Having a private open-air bath in all 13 rooms sounds like a pretty ideal setup for someone like me who wants to soak alone for a long time. Being able to complete the whole hot spring experience without ever leaving the room is honestly something I'm jealous of.
An Evening with French Cuisine, and Checking Out the Indoor-Friendly Amenities
Both dinner and breakfast are apparently served in the dining room, with dinner offered as a choice between a 5:30 PM or 6:00 PM seating, and the restaurant reportedly closes at 9:00 PM. There's a dress code stating guests should "come dressed in regular clothing," meaning dining in a yukata doesn't appear to be allowed. The owner-chef reportedly trained at the Imperial Hotel, and the cuisine is said to feature French dishes incorporating Japanese sensibilities. There's no lunch service, and while allergy accommodations are possible, individual requests based on personal taste or disliked ingredients don't seem to be accommodated.
Room amenities apparently include a TV, satellite broadcasting, a refrigerator, and a hair dryer, along with rental items like a trouser press, iron, and desk lamp. The amenities also seem quite extensive, including original low-irritant toiletries made with over 85% natural ingredients, plus bathrobes, yukata (adult sizes only), and loungewear. That said, children aged 12 and under aren't allowed to stay, and pets aren't allowed anywhere on the property, so that's worth keeping in mind beforehand. Also, apparently no outside food or drink is allowed at all, per health department guidance.
Wi-Fi is reportedly available free of charge throughout the entire building and in every room, so internet access on-site shouldn't be much of a concern. There's also free parking for 12 cars with no reservation needed, though studless tires are apparently recommended in winter, so it's worth preparing accordingly if you're driving there during snowy months.
- Smoking: Starting June 1, 2026, the guest room building is scheduled to become entirely non-smoking, including room terraces (a smoking booth is available inside the building)
- Baggage: The front desk can apparently receive courier deliveries, and can also hold luggage on the day of check-out
- Nearby convenience store: There's reportedly a Lawson about a 3-minute drive away
As for nearby sightseeing spots, Owakudani, the Pola Museum of Art, the Hakone Museum of Glass Forest, and the Hakone Lalique Museum all seem to be roughly a 10-minute drive away. The Sengokuhara silver grass field is apparently about a 30-minute walk, so depending on the season, a stroll there could be enjoyable too. That said, I couldn't find any restaurant information on the official website—just a few names that came up in search results—so if you're visiting for the food, it seems safer to check business hours in advance.
Rakuten Mobile Signal Conditions
When I checked this facility's location using the official "My Area Connectivity Simulation" tool, the overall rating came out as "C."
Since it's rated C, the signal might be somewhat unstable depending on the exact spot. Since Wi-Fi is apparently available for free throughout the entire building and in every room, it seems like you can rely mainly on Wi-Fi during your stay, but if you're planning to use Rakuten Mobile signal while out and about or traveling, it might be reassuring to check the official tool in advance just in case.
Hearing 'C rating' makes me a little uneasy, but free in-room Wi-Fi throughout the building is a reassuring point for someone like me who barely drives. Setting aside signal while moving around, it seems like you wouldn't run into trouble just staying holed up in your room.
