The House the Tunnel Built
The main house of the former Kawamoto Residence (旧川本家住宅主屋, Kyū-Kawamoto-ke Jūtaku Omoya) is a timber dwelling completed in 1933 on a hillside in Nishitobe-chō, Nishi Ward, Yokohama, and it was entered in Japan's national register of Tangible Cultural Properties on 15 August 2024.
Most old houses are dated by the family that raised them. This one is dated by a railway.
In December 1931 the Keihin Electric Railway, the company that would become today's Keikyu, opened its line south of Yokohama Station and drove a bore through the ridge between Tobe and Hinodechō. The Agency for Cultural Affairs records the main house as newly built in connection with that tunnel excavation, and gives its date as 1933. A Keikyu manager, speaking to the regional broadcaster tvk when the registration was announced, said the company's tunnel runs directly beneath the building. Trains pass under the floorboards several times an hour.
What went up on the reshaped ground was a single-storey house with a small upper room, roofed in clay tile with sheet metal over one section, covering 231 square metres of ground. The exterior reads as thoroughly Japanese. The inside does not behave that way.
Japanese houses of the 1920s and 1930s were still commonly built as chains of rooms, each opening into the next through sliding panels, so that privacy depended on who happened to be listening. Here the plan works differently. Corridors carry circulation around the rooms rather than through them, and shelving units were set into the partitions between rooms, thickening the boundaries. The result gives each space a degree of independence that the Agency's assessment calls modern in its planning. A reception room with a parquet floor sits inside this Japanese-looking envelope. Fine-grained joinery and selected figured timbers, known in Japanese as meiboku, appear throughout.
Why It Was Registered
Japan protects buildings at two very different intensities. Important Cultural Properties and National Treasures are designated, which brings tight controls and substantial state involvement. Registered Tangible Cultural Properties sit in a lighter system created in 1996, aimed at buildings roughly fifty years old or more that remain in use and in private hands. Owners keep considerable freedom to alter and adapt; the register exists to slow the quiet disappearance of ordinary good architecture.
Three criteria admit a building to the register. The Kawamoto main house was accepted under the first of them, "a model of design" (造形の規範となっているもの), which points at quality of composition and craft rather than rarity or landscape value. Its two companions on the same plot, the storehouse and the front gate with its stone walls, came in under a different criterion, contribution to the historic landscape of the country. One household, one registration round, two arguments.
The paperwork puts the main house at registration number 14-0348, announced on 15 August 2024 in the 107th round of registrations. The Council for Cultural Affairs had recommended it to the Minister of Education, Culture, Sports, Science and Technology five months earlier, on 15 March 2024. The City of Yokohama noted at the time that the three Kawamoto entries would bring the city's total of registered buildings to 46.
The phrase that recurs in the official assessment is "a good-quality modern wafū residence." Wafū means Japanese in manner, and the modern qualifier matters. This is not a farmhouse or a merchant's town house preserved by luck. It is a designed suburban home from the decade when Japanese architects were working out how a family could live with Western furniture, electric light and a demand for private rooms without abandoning tatami and tiled roofs.
Seeing It, and the Limits on Seeing It
The former Kawamoto Residence is not open to the public. It stands vacant, owned and managed by Keikyu Corporation, and the Agency for Cultural Affairs stated at the time of registration that a plan for local use was under consideration. The same Keikyu manager quoted by tvk described neighbourhood interest in turning the empty house into a place where residents could gather. No opening date has been announced, and no visitor facilities exist.
That leaves the exterior, seen from the narrow public lanes that climb the hill. The house presents its principal face to the south, and the gate and stone retaining wall that screen the plot from the road are themselves registered. Anyone walking up should treat the surroundings as what they are: an occupied residential district of narrow streets and close neighbours. Photography from the public road is unrestricted, entering the grounds is not permitted, and the residents nearby did not sign up to be part of a heritage itinerary.
Getting there is easy. Tobe Station on the Keikyu Main Line lies roughly ten minutes on foot to the north, most of it uphill; the elevated station, opened in 1931 alongside the tunnel, is itself part of the story. Hinodechō Station sits about the same distance to the southeast, on the far side of the ridge the trains pass through.
Nogeyama Park, with its long-established municipal zoo and its viewpoint over the harbour, is only a few hundred metres away and makes the obvious pairing for an afternoon. For anyone interested in how Yokohama built on slopes, the Bluff-style stone walls of the Yamate district across the valley offer the comparison the Kawamoto stonework invites.
Until the house opens, the fullest view of the interior is the photographic record in the Agency for Cultural Affairs database, which includes an image of the western-style room seen from inside. It is a modest set of pictures for a building of this quality, and one more reason to hope the local discussions come to something.
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Q&A
- Can the former Kawamoto Residence main house be visited or entered?
- No. The building is vacant and closed to the public, with no visiting hours or admission arrangement. Keikyu Corporation owns and manages it, and a plan for community use was still being considered at the time of registration in 2024. The exterior can be seen from the public lanes below.
- Why was the former Kawamoto Residence main house built in 1933?
- The Agency for Cultural Affairs records that it was newly built in connection with the excavation of the Keihin Electric Railway tunnel through the ridge, on a line that opened in December 1931. Keikyu has stated that its tunnel runs beneath the property. An earlier storehouse on the site, dated 1899, was kept and relocated at the same time.
- What makes the interior of the former Kawamoto Residence main house unusual?
- The plan gives each room a measure of independence, using corridors for circulation and setting shelving into the partitions between rooms rather than relying on sliding screens alone. A reception room with a parquet floor is included, while the exterior is held to a uniformly Japanese vocabulary. Delicately detailed fittings and selected figured timbers appear throughout.
- How do I reach the former Kawamoto Residence main house?
- The site is at 1-13 Nishitobe-chō, Nishi Ward, Yokohama, about ten minutes uphill on foot from Tobe Station on the Keikyu Main Line. Hinodechō Station is a similar distance on the other side of the hill. Nogeyama Park and its zoo are a few hundred metres away.
- Is the former Kawamoto Residence main house the same as the Kawamoto house in Nara Prefecture?
- No. A separate registered property called Kyū-Kawamoto-ke Jūtaku stands in Yamatokōriyama, Nara Prefecture, a former licensed-quarter building of 1924 now open as the Machiya Monogatari-kan. The two share a family name and nothing else. The Yokohama property is a private residence of 1933 in Nishi Ward.
Basic Information
| Name | Former Kawamoto Residence Main House (旧川本家住宅主屋, Kyū-Kawamoto-ke Jūtaku Omoya) |
|---|---|
| Location | 1-13 Nishitobe-chō, Nishi Ward, Yokohama, Kanagawa Prefecture |
| Designation | Registered Tangible Cultural Property (Structure); registration number 14-0348; criterion: a model of design |
| Year Designated | Registered and announced 15 August 2024 (107th registration round); recommended by the Council for Cultural Affairs on 15 March 2024 |
| Quantity | 1 building |
| Dimensions | Timber, single-storey with a partial second storey; tiled roof, sheet metal in part; building area 231 m²; dated 1933 |
| Owner | Keikyu Corporation |
| Public Access | Closed. Vacant building; exterior visible from public lanes only. Use of the property by the local community was under discussion as of 2024. |
References
- National Cultural Properties Database, Agency for Cultural Affairs: Kyū-Kawamoto-ke Jūtaku Omoya
- https://kunishitei.bunka.go.jp/heritage/detail/101/00015003
- Cultural Heritage Online: Kyū-Kawamoto-ke Jūtaku Omoya
- https://bunka.nii.ac.jp/heritages/detail/565561
- City of Yokohama press release, 15 March 2024: Recommendation on Registered Tangible Cultural Properties (Structures)
- https://www.city.yokohama.lg.jp/city-info/koho-kocho/press/kyoiku/2023/bunkatouroku202403.html
- Agency for Cultural Affairs, Council recommendation document of 15 March 2024 (PDF)
- https://www.bunka.go.jp/seisaku/bunkazai/shokai/yukei_kenzobutsu/pdf/94080301_03.pdf
- Keikyu Corporation, Tobe Station information
- https://www.keikyu.co.jp/ride/kakueki/KK38.html
Last verified: 2026.08.04