Imura Family Residence Main House

A House Divided at the Front Door

The Imura Family Residence Main House is a wooden dwelling at Oyama in Ainan-chō, Minamiuwa District, Ehime Prefecture, completed in 1938 and entered on the national register as a Registered Tangible Cultural Property on 18 March 2003.

It faces south, tucked into the hills at the edge of the settlement, and covers 143 square metres of ground, which local records also give in the older measure as 43 tsubo. The building is single-storey for most of its length with a two-storey portion, and the roof is tiled throughout.

What makes the house worth the trip is visible before you go inside, and it is a matter of geometry rather than ornament. The entrance sits at the centre of the south front, and it works as a dividing line. To the west of it the house is Japanese: a single-storey range with a Geya skirt roof running around the outside, and Zashiki reception rooms laid out in the way a country house of some standing had been arranged for generations. To the east of it the house turns Western: a drawing room and a dining room on the ground floor, tall narrow windows in place of sliding screens, and green roof tiles instead of the grey used elsewhere.

Ainan-chō occupies the southwestern tip of Ehime, close to the Kōchi boundary, and the Imura Family Residence Main House stands well inland from the coast in a valley of scattered farmhouses.

Why the Imura Family Residence Main House Is on the Register

The house sits on Japan's register of cultural properties, a scheme introduced in 1996 that covers a large number of buildings still in everyday use. Registration runs on a separate track from the older designation system, and this house was registered rather than designated. Its registration number is 38-0042, it was taken up in the thirty-sixth round, and the public notice followed on 8 April 2003.

Registration runs on three criteria, and this one qualified under the first: structures that serve as a model of design. Among rural houses that is the harder of the criteria to meet, since most are registered instead for their contribution to the landscape or for being difficult to reproduce. The Agency for Cultural Affairs record sums up the reasoning in a single phrase, calling the building an example of the hybrid Japanese and Western house in a provincial setting.

The phrase deserves unpacking. Hybrid houses of this type appeared across Japan from the late nineteenth century onward, but the well-known examples belong to wealthy urban clients and to architects with names. What the register recognises here is the same idea worked out in a farming district on the far edge of Shikoku, in 1938, by builders whose names are not recorded. The plan solves the problem cleanly. Rather than scattering Western touches through a Japanese house, or dressing a Western house in Japanese trim, it puts the two halves side by side and lets the entrance take the joint. A visitor arriving on formal business could be received in the eastern drawing room without ever entering the family's Japanese rooms, and the household could keep living to the west exactly as before.

Ainan Town's own account adds that the house was built for the Warabioka family of Oyama, and that it passed later to the Imura family whose name it now carries.

Reading the Elevation from the Road

The house is a private home and cannot be entered, so everything worth noticing has to be picked up from the south elevation. That turns out to be enough, because the design puts its argument on the outside.

Look first at the roofline. The western half is low and horizontal, with the skirt roof wrapping the single-storey range and throwing a deep band of shadow along the wall. The eastern half rises to two storeys and breaks that horizontal line. Two different building types are meeting at the porch, and the roof records the meeting before any of the detail does.

Then look at the openings. Traditional Japanese rooms open through wide sliding panels that run almost the full height between floor and lintel, so the wall reads as a series of horizontal bands. The eastern rooms use tall narrow windows instead, punched into solid wall, which is a Western habit of construction. Standing back far enough to see both halves at once, the change in rhythm is unmistakable.

Finally, the tiles. Grey clay tile is the default across most of rural Japan. The green glazed tile on the eastern roof was a deliberate marker, expensive and unusual in a valley like this in the 1930s, and it announced from a distance that this part of the house was doing something different. Overcast light actually shows the colour better than bright sun.

The setting repays a moment as well. The land rises behind the house, the approach comes up from the south, and the valley floor is farmed. This is the ordinary landscape of inland Ainan-chō, and the Imura Family Residence Main House sits in it without any of the walls or gates that mark a mansion.

Visiting the Imura Family Residence Main House

This is a privately owned house. It is not a museum, there are no opening hours, no admission and no interior access, and registration on the national list does not carry any right of entry. Please do not walk onto the grounds, approach the windows or knock at the door.

What is possible is a look at the exterior from the public road that passes the property. That is how the building is meant to be appreciated by visitors, and it shows the composition described above. Photography from the road for personal use is reasonable; anything that involves standing on private land, using a drone, or publishing images commercially is not, and would need the owner's consent. Keep noise down, as people live here.

Getting there needs a car. Ainan-chō has no railway station of its own. The closest rail head is Sukumo Station on the Tosa Kuroshio Railway in neighbouring Kōchi Prefecture, roughly fifteen minutes away by road. From the Ainan town office at Hensō the drive is about the same. Coming from Matsuyama, the usual route is the Matsuyama Expressway as far as Tsushima-Iwamatsu and then National Route 56 south, which takes something over two hours in total. Local bus services in this part of the town are infrequent and are not a practical way to reach the site.

There is no visitor car park. The lane is narrow and used by residents and farm vehicles, so stopping on it causes real problems. Anyone wanting more than a roadside look should contact the Lifelong Learning Division of Ainan Town in advance rather than approaching the household directly.