A 1930 House on a Setagaya Back Street
Kamei-ke Jutaku Omoya (亀井家住宅主屋, also written Kamei-ke Jūtaku Omoya, "main house of the Kamei Residence") is a two-storey wooden dwelling of 1930 in Matsubara, Setagaya Ward, Tokyo, entered on Japan's national register of tangible cultural properties on 31 October 2022. It occupies a generous garden plot in a district that filled up with houses in the decade after the 1923 Great Kanto Earthquake.
The Agency for Cultural Affairs records the building at 143 square metres of floor area on the ground plan, timber-framed, two storeys, roofed in tile. That last word does a lot of work, because two different tiles are involved. The main Japanese block carries an irimoya hipped-and-gabled roof laid with sangawara, the flat pantile that has covered ordinary Japanese roofs since the eighteenth century. The small Western wing beside the entrance takes a plain gable and a very different covering: French pattern interlocking tile, the deeply ribbed type introduced from Marseille and manufactured in Japan from the Meiji period onward.
Two roofs, two tiles, one house. The seam between them is the whole point.
This is a yōkan-tsuki jūtaku, a Japanese house with a Western room attached. The type appeared in the suburbs of Tokyo and Osaka in the Taisho and early Showa years and became the standard aspiration of the salaried professional class. The household lived Japanese: tatami, sliding screens, a corridor of polished timber. Visitors from outside the family were received Western: chairs, a table, a plastered ceiling, glass. Attaching the Western element to the front corner, right beside the entrance, meant a guest could be shown in without crossing the family's territory at all.
Why the Building Was Registered
The registration falls under the criterion of a building that sets a standard in design, the first of the three grounds used for the tangible cultural property register. Its register number is 13-0465, from the 103rd round of registrations. The registration was gazetted and took effect on the same day, 31 October 2022.
A word on categories, because English sources often blur them. Japan runs two parallel systems. Designation (shitei) produces Important Cultural Properties and, at the top, National Treasures; it applies to a small number of buildings and brings strict controls on any alteration. Registration (tōroku), created by a 1996 amendment to the Law for the Protection of Cultural Properties, is a lighter instrument aimed at buildings over fifty years old that are still in everyday use. Owners notify rather than seek permission for most changes, and what the register protects is chiefly the exterior as seen from the public road. Kamei-ke Jutaku Omoya is registered, not designated. The distinction matters for anyone planning a visit, as the following section explains.
What the assessors singled out is the plan. A central corridor runs east and west through the house. At the middle sits a tsuzuki-ma zashiki, a pair of tatami reception rooms divided by sliding partitions that can be removed to make one long space for a gathering. So far, conventional. The unusual move is that a staircase was placed at each end of that reception suite, east and west, so that the route taken by guests and the route taken by the household never had to overlap. Add to this the small observation windows set at several points in the fabric, and a picture emerges of a house planned around the arrival of people whose reception mattered.
The Agency's description states plainly that the arrangement was made in preparation for receiving persons of consequence. It does not identify the family or their occupation, and no reliable public source examined for this article does either. The plan is the evidence; the biography behind it is not on the record.
What You Can Actually See
Be clear about this before setting out: Kamei-ke Jutaku Omoya is a private house. There is no interior visiting, no open day advertised by Setagaya Ward, no ticket. What the register protects and what a visitor can appreciate is the elevation facing the road on the east side. Stand on the public pavement, look, and move on. Do not enter the gate, and treat photography as you would treat photographing any stranger's home, which is to say sparingly and without pointing a lens into windows.
Within those limits there is a fair amount to read. The entrance is placed on the east front, so the composition presents itself squarely to the street: the Japanese roof rising behind, the smaller gabled block of the Western room stepping forward at the corner. Compare the two tile surfaces if the light is good. Sangawara lies almost flat and throws a fine repeated shadow line. French tile has a pronounced roll and a deeper, more irregular shadow. Roofers in 1930 would have handled these as separate trades.
The garden is part of what the assessors valued, and its size is the clue to the plot's age. Matsubara was farmland into the Taisho period. The Keio Line reached the area in 1913 and the Inokashira Line in 1933, and between those dates the fields were cut into house lots. Most were modest. A plot large enough to hold both a house of this footprint and a substantial garden marks the property out from its neighbours, and it still does, ninety-odd years later, in a ward where land is measured carefully.
Getting there is straightforward. Meidaimae Station, served by the Keio Line and the Keio Inokashira Line, is roughly a five-minute walk; Higashi-Matsubara Station on the Inokashira Line is about eight minutes from the other direction. Meidaimae is fifteen minutes from Shinjuku and about seven from Shibuya, which makes this an easy detour rather than an expedition. Combine it with the Inokashira Line's older residential streets, or with the Shimokitazawa district two stops east, and the afternoon holds together.
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Q&A
- Can I go inside Kamei-ke Jutaku Omoya?
- No. It is a private residence and the interior is closed to the public. No regular or seasonal opening is announced by Setagaya Ward or by the Agency for Cultural Affairs. Viewing is limited to the exterior from the public road.
- Where is Kamei-ke Jutaku Omoya and how do I reach it?
- The address is 1-129-7 Matsubara, Setagaya Ward, Tokyo. Meidaimae Station on the Keio and Keio Inokashira lines is about five minutes on foot, and Higashi-Matsubara Station on the Inokashira Line about eight minutes. Meidaimae is roughly seven minutes from Shibuya by train.
- Is Kamei-ke Jutaku Omoya an Important Cultural Property?
- It is not. It is a Registered Tangible Cultural Property, a separate and lighter category introduced in 1996 for buildings over fifty years old that remain in use. Important Cultural Properties and National Treasures are designated under a stricter procedure. Confusing the two overstates the legal protection this house carries.
- What does the Western wing of Kamei-ke Jutaku Omoya tell us about the period?
- A small Western room grafted onto a Japanese house was the standard suburban compromise of the 1920s and 1930s. Families kept tatami living quarters and added one chair-furnished room for receiving outsiders. Placing it at the entrance corner, as here, let a caller be shown in without passing through the household's own rooms.
- Can I photograph Kamei-ke Jutaku Omoya?
- Photographing the exterior from a public road is not prohibited, but people live here. Keep to the street, avoid framing windows or the garden interior, and do not use the images in ways that identify the occupants. Common sense about a neighbour's privacy applies.
Basic Information
| Name | Kamei-ke Jutaku Omoya (亀井家住宅主屋), main house of the Kamei Residence |
|---|---|
| Location | 1-129-7 Matsubara, Setagaya Ward, Tokyo |
| Designation | Registered Tangible Cultural Property (Structure); register no. 13-0465 |
| Year Designated | Registered 31 October 2022 (103rd registration round) |
| Quantity | 1 building |
| Dimensions | Timber frame, two storeys, tiled roof; building area 143 m² |
| Owner | Private (owner not published in the Agency for Cultural Affairs database) |
| Public Access | Interior closed. Exterior viewing from the public road only |
References
- National Database of Designated Cultural Properties, Agency for Cultural Affairs: Kamei-ke Jutaku Omoya
- https://kunishitei.bunka.go.jp/heritage/detail/101/00014326
- Cultural Heritage Online: Kamei-ke Jutaku Omoya
- https://bunka.nii.ac.jp/heritages/detail/556935
- Agency for Cultural Affairs: Registered Tangible Cultural Properties (Structures)
- https://www.bunka.go.jp/seisaku/bunkazai/shokai/yukei_kenzobutsu/toroku_yukei.html
- Setagaya City: Cultural Properties in the Ward
- https://www.city.setagaya.lg.jp/02059/3397.html
Last verified: 2026.08.22