Shimazaki Family Residence (Kataoka, Shiojiri City, Nagano

A Farmhouse That Defined a Regional Style

The main block of the Shimazaki Family Residence runs 12.7 meters across its front and 16.1 meters deep, a near-square footprint capped by a low gabled roof. You enter through the gable end rather than the long side, walking in under the triangular peak. This arrangement, together with the gentle pitch of the roof and the broad timber frame inside, marks the house as honmune-zukuri, a farmhouse form found across the central and southern valleys of Nagano Prefecture.

What sets this particular building apart is its age. Carpenters raised it during the Kyōhō era, between 1716 and 1735, and it is commonly cited as the earliest surviving example in which the honmune-zukuri form appears fully worked out. The house still stands at Kataoka, on the eastern edge of Shiojiri City, in the same farming district where it was built.

The Honmune-Zukuri Tradition

Honmune-zukuri developed in the Matsumoto basin and the valleys to its south, where heavy snow and strong mountain winds shaped how people built. The roof sits at a shallow angle and was originally covered with wooden boards held down by rows of stones, a technique recorded in the building's official structural description alongside the iron sheeting that protects it today. At the ends of the ridge sat a decorative crossing of the bargeboards known as suzume-odoshi, literally a sparrow-startler, which began as a practical way to keep the edge boards from lifting in the wind and grew into a regional signature.

Inside, the plan tends toward a square divided into a working earthen floor on one side and raised rooms on the other. The form carried social meaning as well. A large, well-proportioned honmune house signaled the standing of a leading farming family, and the better examples reserved careful craftsmanship for the formal reception rooms.

Why It Is an Important Cultural Property

The national government designated the Shimazaki Family Residence an Important Cultural Property on June 2, 1973. The Agency for Cultural Affairs describes it as a fully realized early example of honmune-zukuri whose structure still shows clear signs of archaism, meaning the framing and joinery preserve older practices that later houses smoothed away.

Two features drew particular notice. To fit three formal zashiki rooms, the builders pushed one of them out beyond the main rectangle as a separate wing, an uncommon solution that gives the plan its irregular outline. The carved ranma, the openwork transoms set above the sliding screens between these reception rooms, were also singled out for the quality of their design. For a working farmhouse, this concentration of decorative effort in the guest rooms speaks to the family's position in the village.

What to Notice

Approach from the gable end and the geometry of the front becomes clear: the wide triangle of the roof, the entrance set beneath it, and the long horizontal sweep of the eaves that extend along both the south and north sides. The roof you see is iron sheet, a later replacement for the original stone-weighted boards, but its low slope keeps the older proportions.

The projecting wing on the south side reads differently from the main block. It carries a hip-and-gable (irimoya) roof rather than the plain gable of the body, and at 5.2 by 6.1 meters it forms a distinct volume holding one of the three reception rooms. Step toward the interior reception space, where access is possible, and look up at the ranma transoms; their carving is the detail the designation singles out.

Because the house has stood for roughly three centuries, the timber itself rewards a slow look. Posts and beams cut by early eighteenth-century carpenters carry tool marks and a settled patina that newer buildings cannot imitate.

Planning a Visit

The Shimazaki Family Residence remains a privately owned home rather than a museum, so it is not open on a regular public schedule. Anyone hoping to see it should contact the Shiojiri City Board of Education Cultural Properties Division in advance to ask about current access. The address is Kataoka 8066-1, Shiojiri City, reached from JR Shiojiri Station or, by car, from the Shiojiri interchange on the Nagano Expressway.

Shiojiri rewards a longer stay for anyone interested in old buildings. The city holds seven nationally designated Important Cultural Property farmhouses, including the Horiuchi Family Residence, another honmune-zukuri of the later eighteenth century. The Hiraide archaeological site preserves a large settlement spanning the Jōmon to Heian periods. Two preserved historic districts lie within the modern city limits: the Nakasendō post town of Narai-juku and the lacquerware quarter of Kiso-Hirasawa, where the Kiso Lacquerware Museum displays the tools and products of the local craft.