Ryuguden Honkan, Hakone: The Day-Use Onsen with Mount Fuji and Lake Ashi (2026 Prices, Tattoo Rules, Access)

Kanagawa · Hakone · Onsen

By Nobu · Updated September 2026 · Checked against the operator’s, the transport companies’ and each rival facility’s own pages on 1 September 2026

Ryuguden Honkan at Lake Ashi is a day-use hot spring inside a 1938 building that was taken apart, carried over the mountains and rebuilt here — and it is one of the few baths in Hakone where Mount Fuji and Lake Ashi appear in the same view. A weekday adult pays ¥2,300, plus ¥600 if you need a towel. Tattoos are refused outright.

One thing to fix in your head before anything else, because it is counter-intuitive: Honkan means main building, but the Honkan is the day-use bathhouse. The ryokan’s guest rooms are in the annex. Get those the wrong way round and you will book the wrong thing.

I wrote this because the English-language material on this place is thin, and the three things a visitor most needs to know are the three things nobody states plainly: what it really costs once you include a towel, what happens at the door if you have a tattoo, and whether the Fuji view is a marketing line or something you can plan around.

All three have answers. None of them are on the operator’s English page.

What does it actually cost?

¥2,300 for an adult on a weekday and ¥2,600 at weekends and on public holidays, tax included. Those prices took effect on 1 April 2026, up ¥100 from the year before. Children of elementary-school age pay ¥1,300 or ¥1,600, and children from three years old pay ¥700 or ¥1,000. The ¥50 bathing tax that applies from age twelve is already inside those figures, so there is nothing extra at the desk.

Two things make the real number higher, and both catch visitors out.

Shampoo, conditioner and skincare are provided free in both bathing areas — the women’s side has cleansing wash, lotion and milk, the men’s side hair tonic and aftershave. What is not provided is a towel. Japanese day-use bathers habitually bring their own, so the ¥600 towel set is the visitor add-on here. A cheap face towel from any convenience store will do the job if you would rather not pay it.

Can you go if you have tattoos?

No. This is the flattest refusal I have read on a Japanese onsen page, and I want to quote it rather than paraphrase, because visitors keep being told that Japanese tattoo rules are soft in practice.

The operator’s own day-use page states that entry is firmly refused to organised-crime members and to anyone with tattoos, and that if a tattoo is discovered after entry the visit will be stopped immediately and the guest will be asked to leave. There is no cover-sticker allowance and no exception for small or fashion tattoos published anywhere on the site.

Turning up with a covered tattoo and hoping is not a plan. Two hours from Tokyo, it is an expensive way to find out.

Hakone as a whole is more mixed than that, and the differences are worth knowing before you choose where to bathe. Every rule below is from the facility’s own site.

Is the Mount Fuji view real, and when can you actually see it?

The view is real, but the operator states it without any weather caveat at all, so I will supply one. Mount Fuji spends a lot of the year behind cloud, and the month you visit changes your chances enormously.

There is no Hakone-specific visibility statistic. I looked, and the Hakone Tourism Association’s own Fuji viewpoint page gives no month, no season and no figure. What does exist is the Tokyo Metropolitan Government’s continuous count of days Mount Fuji was visible, observed at 9am from its own building, running since the 1990s. It is Tokyo rather than Hakone, so treat it as a rough seasonal guide and not as Hakone odds. The broad winter-versus-summer pattern is very likely to apply here too, but I cannot give you a Hakone number, because nobody publishes one.

January averages 19.1 visible days and August 1.7 — about eleven times the chance. That gap is why a summer visitor who books this bath for the view often leaves disappointed while a January visitor thinks the place is magic. Those monthly figures are long-run averages and add up to roughly 95 days a year; the most recent completed fiscal year, April 2025 to March 2026, ran better than average at 111 days, with January and December the best months.

There is a nice piece of local lore behind why a Fuji-view onsen here is unusual at all. In Hakone it was long said that hot springs do not well up where Mount Fuji is visible. That saying is recorded by the tourism association in the context of a different spring, so I will not stretch it onto this one — but it explains why a bath with this particular combination of water and view is a late arrival rather than an old institution.

The building is the actual reason to come

Ryuguden Honkan is a nationally Registered Tangible Cultural Property, and its story is stranger than the bath.

It was built in 1938 — not here, but on Bentenjima on Lake Hamana in Shizuoka, as the Hamanako Hotel, a top-tier hotel with western rooms, French cooking and horse-carriage transfers from the station. Its exterior was modelled on the Phoenix Hall at Byodoin in Uji, the building on the back of the ¥10 coin. It was built under Tobishima Shigeru, then head of the construction firm known today as Tobishima Corporation.

It lasted about eighteen months before closing. After the war the whole building was dismantled over roughly five months, moved by rail to Atami and then hauled over mountain roads to Lake Ashi, and rebuilt across more than a year by shrine carpenters and craftsmen brought in from around the country. It reopened here in 1957 as Ryuguden, this time as a Japanese ryokan with every room converted to tatami. Keyaki and hinoki went into it.

Prince lists Nehru and Adenauer among the figures who used the property after it reopened in 1957. The current Emperor Emeritus and Empress Emerita stayed in 1964, when they were Crown Prince and Princess. A Japan–UK summit was held here in 2003. Then in 2011 the main building was closed to overnight guests on safety grounds after the Great East Japan Earthquake, and it sat unused until 2017, when it reopened as a day-use bathhouse and was registered as a cultural property in the same year.

You are paying ¥2,300 to bathe on the ground floor of a pre-war luxury hotel that was carried over a mountain range and put back together by shrine carpenters.

How do you get there without a car?

The single simplest option is the direct highway bus. Odakyu’s Hakone line runs from Busta Shinjuku, the terminal at Shinjuku’s south exit, to a stop called Hakone-en in about two hours forty minutes on the current timetable, and Hakone-en is a ten-minute walk from the bathhouse. No transfers, no working out which bus company you are on. Be aware that some Prince Hotels pages still show an older figure of about 2h25 and name the west exit — go by the bus operator’s own timetable, which was revised in June 2026.

If you are already inside Hakone, take the Hakone Tozan bus from Hakone-Yumoto towards Moto-Hakone-ko, about thirty minutes, then pick up the free Lake Ashi area loop bus for about five minutes. That loop bus is genuinely useful: it links The Prince Hakone Lake Ashinoko, Ryuguden, Hakone-en and Moto-Hakone, which means it connects the bath to Hakone Shrine and the Moto-Hakone boat piers at no cost.

One genuinely useful modern detail: contactless card and phone payment now works across the Odakyu-group transport — the Tozan train, cable car, buses, the pirate ships and the Hakone Ropeway — and paying that way upgrades the cruise and ropeway from a return ticket to a one-day unlimited one. That does not extend to the Seibu side, so carry another payment method for Hakone-en.

Where does it sit among Hakone’s day-use baths?

At the expensive end, and you are paying for the building and the view rather than for scale. Yunessun’s onsen area starts at ¥1,500, Hakone Yuryo is ¥1,700 on a weekday, and Ryuguden Honkan is ¥2,300. Tenseien runs a twenty-three-hour operation and includes towels and a yukata in the price, which changes the comparison if you are staying late.

What are the rules once you are inside?

You bathe naked, you wash before getting in, and the small towel stays out of the water. The operator publishes its own etiquette list and it is unusually complete, so these are its rules rather than my advice: wash your body before entering, tie long hair up so it does not touch the water, no swimwear, no towel in the bath, no cameras, no phone use, no swimming or diving, no loud voices, and no saving places in the washing area or sauna.

Two rules catch foreign visitors specifically. Photography inside the bathing area is prohibited outright — a Prince property in the same complex words it as a ban on recording by any medium, for any reason. And at Ryuguden Honkan mixed bathing is not allowed for children aged seven or older, or taller than 120cm, which means a mixed-sex family group has to split at the changing rooms sooner than many visitors expect. The age-seven line follows national health ministry guidance and is common across Japan, but the exact rule is set facility by facility, so check the one you are visiting.

What else is there, and should you stay the night?

The bathhouse sits a ten-minute walk from Hakone-en, a leisure complex with an aquarium, a ropeway up Komagatake, boat piers and restaurants. The free loop bus links the whole lakeside strip including Hakone Shrine, so a half day here assembles itself without much planning.

On staying: the difference between the two neighbouring hotels is sharper than it looks, and it is worth understanding before you book.

If the bath is the reason you are coming, staying at Ryuguden itself is the move: entry is free, you get the early-morning window that day visitors never see, and you walk there along a second-floor corridor rather than paying at a desk. The exact discount at the Prince is not published, so ask at check-in rather than assuming it matches the member rate.

Common questions

How much is Ryuguden Honkan day-use onsen?

¥2,300 for an adult on a weekday and ¥2,600 at weekends and on public holidays, tax and the ¥50 bathing tax included, at prices effective from 1 April 2026. Towels are not included: a bath and face towel set is ¥600, so budget ¥2,900 if you arrive with nothing. Joining Seibu Prince Global Rewards is free and cuts the weekday adult price to ¥1,900.

Can I enter with a tattoo?

No. The operator’s own page refuses entry to anyone with a tattoo and states that a guest found to have one after entering will be asked to leave. No cover-sticker allowance or small-tattoo exception is published. If you have tattoos, Hakone Yuryo near Hakone-Yumoto lifted its restriction on 1 April 2025 and is the straightforward alternative; Yunessun allows tattoos that are fully covered by two of its own paid seals.

Can you really see Mount Fuji from the bath?

Yes, on a clear day, but the odds depend heavily on the month and the operator publishes the claim without any weather caveat. Official Tokyo observation data gives an average of 19.1 days in January against 1.7 in August. Note also that the operator’s own captions place the Lake Ashi and Fuji view at the women’s open-air bath and the men’s indoor bath — the men’s open-air bath carries no such caption.

Do I need to book, and can non-guests use it?

Anyone can use it — there is a published general-public price alongside the member rate, so you do not need to be staying anywhere. Everything points to walk-in for ordinary bathing, with reservations documented only for the private rooms, the restaurant and a web-only plan. That said, no official page states outright that no reservation is needed, so if you are travelling a long way on a peak weekend it is worth a call to 0460-83-1126.

What are the opening hours?

9:00 to 20:00 on weekdays and 8:00 to 20:00 at weekends and on public holidays, with last admission at 19:00 every day. Guests staying at the Ryuguden annex get a longer window, 6:00 to 20:00, which is the practical argument for sleeping there if the bath is your reason for coming.

Does the Hakone Free Pass cover getting there?

I could not confirm it, and I would rather say so than guess. The Free Pass is an Odakyu product, while Hakone-en, the Komagatake ropeway and the cruise that serves its pier are run by the Seibu and Izuhakone side. Check coverage for Hakone-en specifically before buying if this bath is central to your plan, and budget for paying separately on this side of the lake.

What makes the building a cultural property?

It is a nationally Registered Tangible Cultural Property, registered in 2017. It was built in 1938 on Lake Hamana in Shizuoka as the Hamanako Hotel, with an exterior modelled on the Phoenix Hall at Byodoin in Uji. After closing within about eighteen months and surviving the war, it was dismantled, moved by rail and road to Lake Ashi, and rebuilt by shrine carpenters, reopening here in 1957.

Related reading

If you are building a wider trip around this, the Mt Fuji hub covers the viewpoints on the Yamanashi side, and our guide to travelling Japan in heavy snow is worth reading if you are chasing those January odds.

Sources checked

Prices, opening hours, towel and rental fees, the spring name and the tattoo rule: the operator’s own pages for 絶景日帰り温泉 龍宮殿本館 at princehotels.co.jp, read on 1 September 2026, with the April 2026 price revision notice. Cultural property status: the Agency for Cultural Affairs national register. Building history: Prince Hotels’ own history page for the property. Etiquette: the operator’s published bathing manners list, and Japan’s Ministry of the Environment leaflet The ABCs for the Safe and Secure Use of Onsen. Mount Fuji visibility: the Tokyo Metropolitan Government’s continuous observation record — Tokyo rather than Hakone, used here for seasonality only, because no Hakone-specific figure is published. Rival facilities’ prices and tattoo rules: the official sites of Hakone Yuryo, Yunessun and Tenseien. Access, fares and parking: the operator’s access pages, Hakone Yusen’s April 2026 fare revision, and Odakyu’s Hakone portal for contactless payment. Hakone Free Pass coverage of the Hakone-en area could not be confirmed and is reported as unverified.