Five Point Eight Metres of Registered Wall
The Maeda Family Residence Earthen Wall (前田家住宅土塀, Maedake Jūtaku Dobei) is a plastered earth wall with a tiled coping at Hommachi 5-chome in Aki City, Kochi Prefecture, built around 1929 and entered on Japan's national register of Tangible Cultural Properties on 21 June 2013.
It runs 5.8 metres. That figure is worth pausing on, because it is the whole of the registered property: one wall, counted as a single unit, protected in its own right by the national government.
The wall joins the south-west end of the main house and turns to close off the west side of the plot. Its ridge runs north to south, covered in sangawara pantiles. Where it meets the house, the height was set to line up with the eaves of the hisashi, the shallow secondary roof over the south side of the main building. From there southwards the wall drops to a lower line and continues at that reduced height. Two heights, one continuous run, and the join reads as a deliberate step rather than an accident of repair.
Why Japan Registers a Wall
The Agency for Cultural Affairs classifies this property not as a building but under sonota kōsakubutsu, structures other than buildings. The same category takes in gates, bridges, chimneys, retaining walls and stone embankments. Registration number 39-0274 was issued in the seventy-fifth round, on the same day as number 39-0273 for the store and main house standing beside it.
The criterion applied was that the structure contributes to the historic landscape of the country. A wall satisfies that test in a way a room interior cannot. What a passer-by sees of a private house in a Japanese town is largely its boundary: the plastered face, the tiled top, the line where the property meets the road. Remove the wall and the house loses the part of itself that belongs to the street.
Registration is a lighter instrument than designation as an Important Cultural Property or a National Treasure. Created in 1996, it covers structures of roughly fifty years or more that remain in private hands and everyday use, and it asks the owner to notify rather than seek permission before making changes. For a working boundary wall that has to be repointed and re-tiled from time to time, that flexibility is the point.
Aki has other walls on the national list. Several of the registered houses in the Doi Kachū quarter, two kilometres or so north-east, include hei and tsuiji-bei among their registered components, and the samurai district is known for its neribei, walls layered from tile and packed clay. The Maeda wall belongs to a different tradition. It is a merchant's wall in the commercial quarter, finished in plaster rather than exposed tile courses.
Plaster Built to Survive a Typhoon
The whole wall is coated in Tosa shikkui, a lime plaster peculiar to this province. Straw is fermented in lime slurry for months before mixing rather than being chopped in dry, and the resulting finish carries a faint warm cast instead of chalk white. It also grips harder and resists wind-driven rain, which in Kochi arrives sideways for several days each autumn.
Along the ridge the builders added himo-shikkui, a rounded bead of plaster run like a cord where the coping tiles meet the wall top. The national database is explicit about the reason: the detail was applied to guard the ridge against typhoons. Wind lifting under a tile edge is how these walls fail, and the bead seals the line where lifting starts.
Look at the east face and check the direction of the tile overlaps. They are hidari-sangawara, left-hand pantiles, laid in mirror image of the standard pattern. This is a Kochi habit, and the register cites it as evidence of regional character. The west face and the east face of the same wall are not identical objects.
Seen together with the house, the wall makes sense as one composition. The main building faces north onto a corner of the old Shikoku pilgrimage route; the wall handles the west flank, closing the plot where the street runs past.
Practical matters. The wall stands on private land and there is no interior access, no admission and no set viewing hours, since it is part of a house that people still occupy. The full length is visible from the public road and can be photographed from there. Do not enter the site.
Aki Station on the Tosa Kuroshio Railway Gomen-Nahari Line lies about 1.1 kilometres to the east, roughly twenty minutes on foot. Continuing north-east brings you to Doi Kachū and the Nora Clock, where the walls of Aki can be compared side by side.
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Q&A
- How long is the Maeda Family Residence Earthen Wall in Aki City?
- It extends 5.8 metres and is registered as a single unit. The national database lists its structure as an earthen wall with tiled roofing, dated to around 1929. Short as it is, the wall is a registered cultural property in its own right, separate from the house it adjoins.
- Can visitors see the Maeda Family Residence Earthen Wall up close?
- The wall faces the public road and its full length can be seen and photographed from there. The site itself is a private residence with no interior access, no admission charge and no published opening hours, so please stay on the road and respect the occupants' privacy.
- What is the himo-shikkui on the Maeda Family Residence Earthen Wall?
- It is a rounded cord of lime plaster run along the ridge where the coping tiles meet the top of the wall. The Agency for Cultural Affairs records it as a measure against typhoons: sealing that joint stops wind getting under the tile edges and stripping the coping.
- Why does the Maeda Family Residence Earthen Wall change height partway along?
- The northern half was set to match the eaves line of the shallow hisashi roof on the south side of the main house, so wall and house read as one silhouette at the point where they meet. The southern half was then built lower, stepping the run down as it moves away from the building.
- Is the Maeda Family Residence Earthen Wall registered separately from the main house?
- Yes. The wall holds registration number 39-0274 and the store and main house holds 39-0273. Both were registered on 21 June 2013 in the same round, and Kochi Prefecture lists them as a pair under the Maeda Family Residence.
Basic Information
| Name | Maeda Family Residence Earthen Wall (前田家住宅土塀) |
|---|---|
| Location | Hommachi 5-1736-8, Aki City, Kochi Prefecture |
| Designation | Registered Tangible Cultural Property (Structures), registration no. 39-0274; category: structures other than buildings |
| Year Designated | Registered 21 June 2013 (Heisei 25), 75th round of registrations |
| Quantity | 1 unit |
| Dimensions | Earthen wall with tiled roofing; length 5.8 m |
| Owner | Private (owner name not published in the national database) |
| Public Access | Visible from the public road; private property with no interior access, no admission and no set hours |
References
- National Database of Designated Cultural Properties, Agency for Cultural Affairs: Maeda Family Residence Earthen Wall
- https://kunishitei.bunka.go.jp/heritage/detail/101/00009676
- Cultural Heritage Online: Maeda Family Residence Earthen Wall
- https://online.bunka.go.jp/heritages/detail/258992
- Kochi Prefecture: Registered Tangible Cultural Properties (Structures), Cities
- https://www.pref.kochi.lg.jp/doc/2024031100056/
- Kochi Prefecture Tourism Information: Doi Kachū Preservation District
- https://kochi-tabi.jp/search_spot_sightseeing.html?id=802
Last verified: 2026.08.09