Shido Family Residence Uchigura

A Taisho Strongroom With an Imported Roof

The Uchigura of the Shido Family Residence (紫藤家住宅内蔵, Shidō-ke Jūtaku Uchigura, also written Shido-ke Jutaku Uchigura) is a two-storey plastered storehouse built in 1920 at 3-32 Suidocho, Chuo Ward, Kumamoto City, and entered on Japan's national Register of Tangible Cultural Properties on 6 August 2025 under registration number 43-0207. It stands toward the western side of the residence plot and links to the main house by a corridor.

Japanese has several words for a storehouse, and the distinctions matter. A dozo is the thick-walled, fire-resistant type built of earth and finished in plaster. An uchigura is one placed inside the residential compound and reached without going out into the weather, as opposed to the detached storehouses that sit at the back of a plot or face the street. The Shido building is both: a dozo in construction, an uchigura in position, and specifically a kazai-gura, the household strongroom for family possessions rather than for stock or tools.

Its footprint is small, about 28 square metres, with one room on each of the two floors. The roof is gabled, pantiled, and entered on the long side. Everything about the proportions is vertical and compact, which is what a strongroom wants to be.

Reading the Walls

Registration came under the criterion covering structures that contribute to the historic character of the national landscape, and the assessment singles out the exterior. Once you know what the surfaces are doing, the building becomes legible.

The outer walls are finished entirely in white shikkui lime plaster over an earthen core. Under the eaves runs a hachimaki, a thickened plaster band shaped like a headband, which is the first line of defence for the wall head. Around the base sit two tiers of mizukiri, projecting drip mouldings that throw rainwater clear of the plaster below. Lime plaster fails when water gets into it and stays there, so a storehouse built to last is largely a set of answers to that problem.

The door on the east face is a kakego-nuri type. Rather than closing flush, its edges and the frame are cut in stepped rebates and then plastered, so that shutting the door produces an interlocking joint several layers deep. In a fire, smoke and heat cannot find a straight path through the gap. The windows carry nurikome side walls, short plastered wing walls flanking each opening, which shield the aperture from flames licking along the wall face. These are not decorative flourishes. A merchant or professional family kept deeds, ledgers, textiles and lacquerware in a building like this, in a city that had burned before.

Then comes the surprise. The roof structure is a king-post truss, a Western framing system in which a central vertical member hangs from the ridge and carries the tie beam below it, holding the whole triangle rigid. Japanese carpentry traditionally spans roofs by stacking horizontal members on short props, a wholly different logic. Truss framing arrived with the engineering education of the Meiji period and spread through factories, schools and railway sheds. Finding one inside a small plastered strongroom of 1920 shows how far that knowledge had travelled by the Taisho years, and how readily a local carpenter would combine it with an unbroken tradition of earthen-wall construction.

Where It Sits, and What You Can See

The Uchigura is a private building on a private plot and is not open to the public. No admission scheme, opening day or interior viewing has been announced, and the residence is enclosed by a wall. Visitors should not enter the grounds or attempt to photograph over the wall. The Agency for Cultural Affairs publishes two images, an exterior from the northwest and a view of the second-floor interior, and for now these are the closest look available.

The corridor connecting storehouse and main house is worth thinking about even without seeing it. It means the family could reach their valuables in slippers, in the rain, at night. That arrangement is common in the substantial town houses of Meiji and Taisho Japan and it quietly changes the character of the storehouse, turning a defensive outbuilding into part of the daily plan of the home.

Suidocho is a straightforward place to reach. Trams on the A and B lines of the Kumamoto City Tram run from outside Kumamoto Station to the Suidocho stop in about fifteen minutes, and the surrounding streets hold the Kamitori and Shimotori arcades and the back lanes known as Kaminoura-dori. Kumamoto Castle lies roughly ten minutes on foot west of the neighbouring Toricho-suji stop. Anyone interested in what survives of the pre-war city will find the walk between these points more informative than any single address, and the registration of the Shido buildings in 2025 marks one of the fragments still standing.