Nagashiki Family Residence Storehouse: Twenty-Nine Square Metres of Hard Currency
The building measures 29 square metres. That is smaller than a lot of studio apartments, and the Nagashiki family built it out of timber, plaster and fired clay heavy enough to survive two centuries on a Seto Inland Sea hillside. Everything about the thing is disproportionate to its footprint, which is the point of a kura.
It stands south of the main house, inside the same walled compound on a hill in Kōnoshima, a district of Kasaoka City in Okayama Prefecture. Two storeys, timber-framed, ridge running east to west, roofed in heavy formal tiles under a plain gable, and entered from the long north side rather than through a gable end. The Agency for Cultural Affairs assigns it to the late Edo period, in the range 1830 to 1868, making it a contemporary of the main house it serves.
The family who put it up were shōya, village headmen of Kōnoshima Uchiura from the closing decades of the Edo period, and their fortune came from two sources: kaisen coastal shipping and the development of salt fields. Kōnoshima was still an island then. The Kasaoka Bay reclamation project, started in December 1966 and completed in March 1990, replaced the water below this hill with farmland. A storehouse on this site once looked out over the shipping lanes that paid for it.
Why the Building Was Registered
The storehouse joined the national register as a Registered Tangible Cultural Property (Building) on 6 March 2024, number 33-0359, in the 106th round. The main house and the inner gate went on the register the same day, and the three are best understood as a set.
Registration and designation are separate systems and produce different things. Designation gives Japan its National Treasures and Important Cultural Properties, a small population held under tight control where alterations need permission. Registration arrived later, in the 1996 revision of the Law for the Protection of Cultural Properties, and was built for breadth rather than depth: buildings around fifty years old or older, changes handled by notification rather than application, ownership and everyday use left intact. Roughly fourteen thousand structures nationwide hold the status. It is the mechanism that allows a working farm outbuilding or a family storehouse to be recognised without freezing it.
The criterion applied was contribution to the historic landscape of the nation. The Agency's assessment ends on the visual point: the weight of the exterior is what makes the compound read as a compound. Take the kura away and the main house loses its counterweight.
What to Look For
Start with the walls. They are finished in white lime plaster, and at the outer corners and around the base of the second storey the surface switches to namako-kabe: square tiles laid on the wall with the joints between them raised into fat white ridges of plaster. The name comes from the sea cucumber, which is what those swollen joints were thought to resemble. The technique is armour. Tile and lime resist fire and salt-laden wind, and the corners and the lower wall are exactly where a building takes its punishment. That the pattern is also handsome was never an accident. A merchant family advertised its standing on the surfaces that worked hardest.
The north face carries a small roof over the doorway and two window openings, and that is the whole vocabulary of the elevation. A kura is not supposed to be generous with openings.
Inside, the ground floor is a single earthen-floored room with a granary partitioned off along its eastern edge. Kasaoka City's cultural properties office reports that the grain storage fittings survive, and reads the building as having served as a granary when it was new. Rice was tax, rice was wage, rice was savings. The room where a headman's household kept it was the room that mattered.
The upper floor is one boarded room, used for household goods. The Agency's photographic record includes a shot of the roof frame up there, and the carpentry in that space is one of the reasons the record exists.
Then look at the ridge. Kasaoka City notes that the roof was reworked in the Taishō era and that the main ridge carries the same patterning found on the main house. Two buildings, one campaign of work, one decorative hand.
The practical situation: this is private property and there is no standing public access. The grounds open during events staged on the site, including a handmade soba gathering, with dates announced through the "長鋪邸" Facebook page. Toilets and parking operate during events only. By car it is roughly thirteen minutes from JR Kasaoka Station and nineteen from the Kasaoka interchange on the Sanyō Expressway. Anyone drawn to namako-kabe and unable to get on site will find the same technique used generously and publicly along the merchant streets of Tomonoura, west along the coast in Hiroshima Prefecture.
- 📍 Plan Your Visit to Okayama
- Find tours, activities & transport passes near Built into the Nagashiki Family Residence
- [ Kurashiki Bikan District & Korakuen Garden Tours ]
Q&A
- What is namako-kabe for?
- Protection first. Flat tiles are fixed to the wall and the joints are packed with lime plaster raised into rounded ridges, giving a surface that stands up to fire, rain and salt wind. On this storehouse it appears at the outer corners and around the base of the second storey, which are the most exposed parts of the wall. The decorative effect came along with the engineering.
- Can I see inside the storehouse?
- Not on a regular basis. The property is a private residence with no fixed opening hours. Access to the grounds happens when events are held on site, and those are announced on the "長鋪邸" Facebook page.
- What was actually kept in it?
- Grain, in the beginning. A granary is partitioned along the eastern edge of the ground floor and its fittings are still there, which is why Kasaoka City reads the original use as grain storage. The boarded upper floor held household goods and furnishings.
- Is a Registered Tangible Cultural Property a lesser thing than an Important Cultural Property?
- It is a different thing rather than a lesser one. Registration, added in 1996, casts a wide net over buildings of around fifty years and up and asks owners only to notify changes, so that structures stay in use. Designation as an Important Cultural Property applies to a much smaller group under far stricter legal control.
- Why does the storehouse have such a heavy roof for its size?
- The formal tiling, hon-kawara-buki, uses paired broad and rounded tiles and weighs considerably more than the lighter pantiles used on ordinary buildings. It costs more and demands a stronger frame. On a storehouse holding a household's grain and valuables, the expense bought fire resistance and durability, and it announced the family's standing at the same time.
Basic Information
| Name | Nagashiki-ke Jūtaku Uchigura (Nagashiki Family Residence Storehouse) |
|---|---|
| Category | Registered Tangible Cultural Property (Building) |
| Registration number | 33-0359 (106th round of registration) |
| Date of registration | 6 March 2024 |
| Registration criterion | Contributing to the historic landscape of the nation |
| Period | Edo period, late Edo, 1830-1868 |
| Structure | Timber frame, two storeys, tiled roof; floor area 29 square metres |
| Quantity | 1 building |
| Location | 3042 Aza-Shirukata, Kōnoshima, Kasaoka City, Okayama Prefecture |
| Owner | Private individual |
| Public access | Not normally open. Grounds accessible during events held on site; dates announced via the "長鋪邸" Facebook page. Toilets and parking available during events only. |
| Access | About 13 minutes by car from JR Kasaoka Station; about 19 minutes from Kasaoka IC, Sanyō Expressway |
References
- National Database of Cultural Properties, Agency for Cultural Affairs: Nagashiki-ke Jūtaku Uchigura
- https://kunishitei.bunka.go.jp/bsys/maindetails/101/00014938
- Cultural Heritage Online: Nagashiki-ke Jūtaku Uchigura
- https://online.bunka.go.jp/heritages/detail/553978
- Kasaoka City: Registered Tangible Cultural Property (Building), Nagashiki Family Residence
- https://www.city.kasaoka.okayama.jp/soshiki/39/61907.html
- Okayama Prefecture: Nagashiki Family Residence Main House, Storehouse and Inner Gate
- https://www.pref.okayama.jp/uploaded/attachment/383950.pdf
Last verified: 2026.07.15