A Corridor That Crosses the Road
Hakone Taiyo Sanso Bekkan (箱根太陽山荘別館, also written Hakone Taiyō Sansō Bekkan and given in English as Hakone Taiyo Sanso Annex), the annexe of a lodging house at 1320-375 Gora in Hakone Town, Kanagawa Prefecture, dates from the late Taisho era and was entered on Japan's national Register of Tangible Cultural Properties on 29 November 2006.
Stand on the road between the two buildings and look up. A covered passage runs overhead from one to the other, carried across the traffic below. It leaves the main building at third-floor level and arrives at the annexe at second-floor level, because the slope drops eastward and the two structures sit on different heights of it.
The annexe is the older of the pair.
The Agency for Cultural Affairs assigns it to the late Taisho period, recording the span 1912 to 1925, with alterations in 1953. Its frame is timber, two storeys with a partial third, roofed in tile with sheet metal over part of it, covering 168 square metres. Set against the main building's 267 square metres, the annexe is the smaller and the plainer of the two.
Built While Gora Was Being Sold Off in Lots
Nothing permanent stood on this slope until the end of the nineteenth century. Hot water was first piped down from Sōunzan in 1894. In 1912 the Odawara Electric Railway, forerunner of the Hakone Tozan Railway, began selling villa plots here with a hot-spring supply included. Gora Park, laid out on French formal principles, opened in 1914. The mountain railway from Hakone-Yumoto reached Gora in 1919, and the funicular climbing on towards Sōunzan followed in 1921.
The annexe belongs to that stretch of years. Politicians, financiers and writers were putting up second houses on the newly divided land, and the lodging trade grew alongside them.
Registration came much later. The building holds number 14-0138 in the 53rd round of registrations, with the main building immediately before it as 14-0137. The criterion applied was that the building contributes to the historic landscape of the country.
A point of vocabulary matters here. A Registered Tangible Cultural Property is not the same thing as an Important Cultural Property. Registration, introduced in 1996, asks owners to notify the authorities before substantial alteration and is designed to keep buildings earning their keep; designation imposes far tighter control. Tourist listings often say the annexe was "designated," and that is inaccurate.
The Third Floor and the Roofline
Guest rooms occupy the second floor and everything above it. On the third floor sits a tsuzuki-ma, a pair of tatami rooms of ten and six mats placed in line and divided by sliding panels, so that the partition can be lifted out and the two thrown into a single space. The arrangement was standard in Japanese houses of the period and is now unusual to find intact in a working inn.
The roof is kirizuma, a plain gable, laid with sangawara pantiles. At the centre of the south elevation a smaller irimoya roof, hipped below and gabled above, pushes forward and interrupts the line. It is a small move. It is also the difference between a long undifferentiated box and a building with a face.
The floor levels are worth watching as you walk through. Because the annexe follows the fall of the ground, its floors do not line up with the main building's, and the covered corridor was the solution: rather than force the two into agreement, the builders simply joined them where they happened to meet.
Practical points. The annexe still takes guests, as part of the kokumin-shukusha Hakone Taiyo Sanso, a category of modestly priced lodge. Rooms are distributed across the main building, the annexe and a newer wing, and the operator allocates them, so anyone hoping for a room in this particular building should raise it at the time of booking. Gora Station on the Hakone Tozan Railway is about three minutes away on foot. Day-use bathing is available in the middle of the day, usually from 11:00, at around ¥1,100 for an hour, with hours and rates subject to change; closing days are irregular and posted on a calendar on the inn's own site. The bath wing itself is a separate hinoki-built structure and is not part of the registered fabric.
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Q&A
- What is the covered corridor at Hakone Taiyo Sanso Bekkan, and can I walk across it?
- It is a watari-rōka, a roofed connecting passage, spanning the public road between the main building's third floor and the annexe's second floor. It is in use by people staying at the inn rather than open as a sightseeing route, but it can be seen clearly from the street underneath.
- Is Hakone Taiyo Sanso Bekkan older than the main building?
- By the government record, yes. The Agency for Cultural Affairs dates the annexe to the late Taisho era, giving the span 1912 to 1925, while the main building is recorded as 1940. The name "annexe" describes its role in the business today, not the order in which the two were built.
- Can I ask specifically to stay in Hakone Taiyo Sanso Bekkan?
- Guest rooms are spread across three buildings, including a newer wing that is not part of the registered property, and the inn assigns rooms itself. Mentioning the preference when you reserve is the practical approach, though no allocation can be guaranteed.
- Has Hakone Taiyo Sanso Bekkan been strengthened against earthquakes?
- According to the operator's own account, seismic retrofitting was carried out in 2007 on the main building, the annexe and the newer wing, bringing the structures up to a seismic index of 1.0. This is the inn's statement rather than a government record.
- What does registration actually mean for Hakone Taiyo Sanso Bekkan?
- It means the building appears on Japan's Register of Tangible Cultural Properties as number 14-0138, entered on 29 November 2006 under the criterion of contributing to the historic landscape. Registration is a lighter regime than designation as an Important Cultural Property: the owner notifies the authorities before major alterations, and the building stays in commercial use.
Basic Information
| Name | Hakone Taiyo Sanso Bekkan (箱根太陽山荘別館) |
|---|---|
| Location | 1320-375 Gora, Hakone Town, Ashigarashimo District, Kanagawa Prefecture |
| Designation | Registered Tangible Cultural Property (Structure), Registration No. 14-0138, 53rd registration round |
| Year Designated | Registered 29 November 2006 |
| Quantity | 1 building |
| Dimensions | Building area 168 m²; timber frame, two storeys with partial third floor, tiled roof with partial sheet metal |
| Owner | Not recorded in the Agency for Cultural Affairs database; operated as the kokumin-shukusha Hakone Taiyo Sanso |
| Public Access | Working lodging house. Interior access through an overnight stay; exterior and the connecting corridor visible from the public road. Irregular closing days. |
References
- Database of National Cultural Properties, Agency for Cultural Affairs: Hakone Taiyo Sanso Bekkan
- https://kunishitei.bunka.go.jp/heritage/detail/101/00006021
- Cultural Heritage Online: Hakone Taiyo Sanso Bekkan
- https://online.bunka.go.jp/heritages/detail/182236
- Hakone Taiyo Sanso, official site
- https://taiyosanso.com/
- Hakone Gora Onsen Ryokan Association: history of the Gora hot-spring district
- https://hakone-goraonsen.com/about/
Last verified: 2026.08.13