A Farmhouse on the Ina Kaido
The Nakamura Family Residence Main House is a farmhouse in Shinotsukacho, Toyokawa City, Aichi Prefecture, built in 1843 and entered on Japan's list of Registered Tangible Cultural Properties (Buildings) in 2022. It faces south onto the old Ina Kaido, a highway that ran inland from the Mikawa plain, and its frontage is noticeably wider than that of its neighbours.
The building is timber-framed with two levels and a partial cellar, roofed in tile, with a footprint of 241 square meters. The upper level is not a full second storey. It is a Tsushi-nikai, a low attic tucked under the roof, and from the road you see it only as a band of narrow openings beneath the eaves. The roof is Kirizuma-zukuri covered in Sangawara-buki pantiles, and a Geya lean-to runs around all four sides, throwing a deep horizontal shadow across the wall.
A guest room was added around 1928, some 85 years after the house went up. The Nakamura Family Residence Main House (中村家住宅主屋, Nakamura-ke Jutaku Omoya) has kept its Edo-period frame while being adapted, room by room, to modern living.
Why the House Was Registered
Japan's registration system for buildings works through three criteria. The Nakamura Family Residence Main House qualified under the one covering structures that contribute to the historic landscape of the country. What was recognised, in other words, was not a single striking feature but the fact that the house still shapes the look of the Ina Kaido. The Council for Cultural Affairs recommended it in November 2021, and registration followed the next year under the number 23-0565.
Architectural historians noted something else: the level of carpentry. The Agency for Cultural Affairs description points to the tall kokabe, the panel of wall between the lintel and the ceiling, as evidence of unusually developed technique for a rural house of its date. A tall kokabe means high ceilings, and high ceilings mean the carpenters were handling long, deep timbers. The roof appears to have been tiled from the beginning as well. In the back country of Mikawa in 1843, a farmhouse under tile rather than thatch or shingle was a plain statement of the family's means.
A Registered Tangible Cultural Property is protected more lightly than a designated one, through a notification system rather than strict controls. The arrangement is built for houses that people still live in, which is exactly the case here.
The Plan, and a Pit for Mulberry Leaves
The floor plan of the Nakamura Family Residence Main House splits cleanly east and west. The eastern half is Doma, packed earth, with a cooking range set into it and, dug beneath the floor, a storage pit for mulberry. Mulberry leaves are silkworm feed. Once they dry out the worms will not touch them, so the leaves had to be kept somewhere cool and damp. The sunken pit did that job. It is a physical trace of the years when Mikawa farming households raised silkworms alongside their rice.
The western half holds 9 rooms in 3 ranks. Most farmhouses of the period made do with 4 rooms in a 2 by 2 grid, so this is a generous plan. The room at the southwest corner has an alcove and is finished as a formal Zashiki. Putting the reception room on the southwest, where the light and the garden view are best, tells you the household expected visitors.
From outside, the thing to watch is how the roof stacks. Because the lean-to wraps all four sides, the front elevation reads as two overlapping planes: the gable of the main roof above, the lean-to below. That doubling is what pulls the long, low silhouette of the Nakamura Family Residence Main House together.
Visiting
The Nakamura Family Residence Main House is privately owned and still lived in. Toyokawa City's own list of designated and registered cultural properties records the owner simply as a private individual. There are no interior tours, no open days, and no public access to the grounds.
What you can see is the exterior from the road. Photography should be limited to that: shots taken from the public street, without pointing a lens over the gate or the hedge, and certainly without stepping onto the property. This is somebody's home, not a museum.
The nearest station is Kozakai on the JR Iida Line, about 15 minutes on foot to the southwest. Ina Station on the Meitetsu Nagoya Main Line is roughly 20 minutes away. The surrounding area mixes houses and rice fields, and there is no visitor car park and no interpretive signage on site. Toyokawa City's Lifelong Learning Division publishes the municipal list of registered properties if you want to confirm the location before setting out.
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Q&A
- Can you visit the Nakamura Family Residence Main House, and is the interior open?
- No. The Nakamura Family Residence Main House is a privately owned home. The interior is closed, no tours are offered, and visitors may not enter the grounds. You can look at the exterior from the public road along the old Ina Kaido.
- When was the Nakamura Family Residence Main House built and when was it registered?
- It was built in 1843, with a guest room added around 1928. It became a national Registered Tangible Cultural Property (Building) in 2022, under registration number 23-0565.
- How do you get to the Nakamura Family Residence Main House, and what is the nearest station?
- The address is 63-1 Ohori, Shinotsukacho, Toyokawa City, Aichi Prefecture. Kozakai Station on the JR Iida Line is about a 15 minute walk to the southwest; Ina Station on the Meitetsu Nagoya Main Line is around 20 minutes away. No visitor parking is provided.
- What is the mulberry storage pit at the Nakamura Family Residence Main House?
- It is a pit dug under the earthen-floored section to hold mulberry leaves, the feed for silkworms. Dried leaves are useless to silkworms, so the leaves were kept underground where it stayed cool and humid. The pit shows that the household combined farming with sericulture.
- How big is the Nakamura Family Residence Main House and how is it built?
- It is a timber building of two levels with a partial cellar, roofed in tile, with a building area of 241 square meters. The upper level is a low tsushi attic. The roof is gabled and pantiled, with a lean-to on all four sides. The east side is earthen-floored and the west side holds 9 rooms in 3 ranks.
Basic Information
| Name | Nakamura Family Residence Main House |
|---|---|
| Location | 63-1 Ohori, Shinotsukacho, Toyokawa City, Aichi Prefecture, and adjoining lots |
| Designation | Registered Tangible Cultural Property (Building) |
| Year Designated | Reiwa 4 (2022), registered |
| Quantity | 1 building |
| Dimensions | Timber, 2 levels with partial cellar, tiled roof, building area 241 square meters |
| Owner | Private individual |
| Public Access | Closed to the public; exterior visible from the public road |
References
- National Cultural Properties Database, Nakamura Family Residence Main House (Agency for Cultural Affairs)
- https://kunishitei.bunka.go.jp/heritage/detail/101/00014160
- Designated Cultural Properties of Toyokawa City (Toyokawa City Board of Education)
- https://www.city.toyokawa.lg.jp/soshiki/kyoikuiinkai/shogaigakushu/2/5/3/1/4066.html
- List of Designated and Registered Cultural Properties, Toyokawa City
- https://www.city.toyokawa.lg.jp/material/files/group/47/shiteibunkazaiichiran20260423.pdf
Last verified: 2026.09.02