The brick chimney that marks the brewery
The Yamayoshi Soy Sauce Boiler House (山吉醤油釜屋, Yamayoshi Shōyu Kamaba) is the fire house of the former Yamayoshi soy brewery at Imasaka in the Noma district of Shōdoshima-chō, Kagawa Prefecture; built in 1908, it was registered as a Registered Tangible Cultural Property on February 9, 2005, under number 37-0261.
The building lies east of the raw-materials store and north of the pressing house and mash-preparation house, separated from the latter by the watercourse that runs across the property. Unlike its neighbours it sits on an east-west axis: a long, narrow single-storey timber structure of about 18 metres by 6, gabled and roofed in pantiles, with a registered building area of 104 square metres.
A vent rises from the ridge slightly west of centre, and immediately to the west of that vent a brick chimney pushes up through the roof to a height of about 15 metres. The chimney forms part of the registered structure, and the Agency for Cultural Affairs entry describes it plainly as the landmark of the Yamayoshi brewery.
What happens in a kamaya
Every stage of soy sauce making that involves heat belongs to this building. Soybeans have to be soaked and then steamed until the protein is accessible to the mould. Wheat has to be roasted and cracked. Brine is prepared. After pressing, the raw liquid is usually given a hi-ire, a controlled heating that halts fermentation, fixes the colour and settles the flavour before bottling. All of it needs a boiler, sustained fire, and a way of getting the flue gas out.
The layout follows from that. The boiler house is a long, thin box rather than a broad hall, because a boiler and its firing floor are linear and want space at each end rather than in the middle. It stands apart from the mash cellars, with a watercourse between it and the pressing house, which is sensible in a district of timber buildings full of vats. The ridge vent lifts steam out of the room; the chimney carries combustion gas well above the roofline.
Registration was granted under the criterion that the building contributes to the historic landscape of the country. Its register number is 37-0261, in the 45th round, and it was the last of the four Yamayoshi entries in numerical order.
Fifteen metres of brick, and why that is unusual
Brick reached Japan as a building material in the second half of the nineteenth century and was taken up first by government works, mills and breweries. A brick industrial chimney on a small island in the Seto Inland Sea, built in 1908, is a marker of how completely the modern factory idiom had spread by late Meiji. It was raised for a soy sauce works whose other buildings are entirely traditional in construction: timber frame, clay tile, charred cedar boarding, white plaster. Old craft below, industrial stack above.
Free-standing brick chimneys have not fared well in Japan. Unreinforced masonry performs badly in earthquakes, and across the country many were shortened, banded with steel or taken down altogether during the twentieth century. That this one still stands to something close to its intended height is part of why it reads so strongly from a distance.
The visual effect repays attention when you are actually walking the lanes of Hishio-no-Sato. The quarter is a landscape of low horizontals: long ridges, wide eaves, black wall boards under white plaster, repeated for building after building. A single vertical column of red brick cutting up through all of that is the one element in the composition that resolves the whole site into a place with an address. Late afternoon light on the west face of the stack is the moment to see it.
Visiting
The Yamayoshi Soy Sauce Boiler House belongs to the working brewery used by Shokin Shoyu, and we found no public opening. If you hope to see inside, contact the company before you go.
The 15-metre brick chimney, on the other hand, rises well above the roofline and is easy to spot from outside the grounds; it is the simplest way to locate the brewery. The site is private, and the working areas are off limits.
- 📍 Plan Your Visit to Kagawa
- Find tours, activities & transport passes near Yamayoshi Soy Sauce Boiler House
- [ Naoshima Art Island & Kotohiragu Shrine Visit ]
Q&A
- How tall is the chimney at the Yamayoshi Soy Sauce Boiler House?
- About 15 metres. It is built of brick, rises just west of the ridge vent, and is included in the registration. The Agency for Cultural Affairs describes it as the landmark of Yamayoshi Soy Sauce.
- What was the Yamayoshi Soy Sauce Boiler House used for?
- It housed the fire-dependent stages of production: steaming soybeans, roasting wheat, preparing brine and heating the pressed liquid before bottling. Those need a steady fire, so the building has both a ridge vent for steam and a chimney for combustion gases.
- When was the Yamayoshi Soy Sauce Boiler House built, and how big is it?
- It dates from 1908, the same year as the raw materials storehouse. The single-storey timber building is about 18 metres east to west and 6 metres deep, with a gabled pantile roof and a building area of 104 square metres.
- Can visitors go inside the Yamayoshi Soy Sauce Boiler House?
- No. It belongs to a working brewery used by Shokin Shoyu and has no visitor facilities. Contact the company in advance about the interior; the chimney and roof are visible from outside the grounds.
- Why does the Yamayoshi Soy Sauce Boiler House stand apart from the other brewery buildings?
- It lies east of the raw materials storehouse and north of the pressing house, with the site's watercourse between it and the timber cellars. Keeping the fire house away from buildings full of wooden vats most likely reduced the fire risk. It is also the only building here with an east-west ridge.
Basic Information
| Name | Yamayoshi Soy Sauce Boiler House (山吉醤油釜屋) |
|---|---|
| Location | 709-2 Ko, Imasaka, Noma, Shōdoshima-chō, Shōzu District, Kagawa Prefecture |
| Designation | Registered Tangible Cultural Property (Structure), register no. 37-0261 |
| Year Designated | Registered 2005/2/9 (Heisei 17) |
| Quantity | 1 building |
| Dimensions | Approx. 18 metres east-west by 6 metres deep; building area 104 square metres; single-storey timber, gabled, pantile roof, with a brick chimney about 15 metres high |
| Owner | Not listed in the Agency for Cultural Affairs database; the buildings are used by Shokin Shoyu Co., Ltd. |
| Public Access | Working brewery; no general admission. Exterior from outside the grounds; ask Shokin Shoyu about the interior |
References
- Agency for Cultural Affairs, Database of National Cultural Properties: Yamayoshi Soy Sauce Boiler House
- https://kunishitei.bunka.go.jp/heritage/detail/101/00004669
- Agency for Cultural Affairs, Database of National Cultural Properties: Yamayoshi Soy Sauce Raw Materials Storehouse and Counting House
- https://kunishitei.bunka.go.jp/heritage/detail/101/00004668
- Shokin Shoyu Co., Ltd.: Company Profile (Japanese)
- https://shokinshoyu.jp/company/
- Shōdoshima Town: Modern Industrial Heritage of Hishio no Sato (Japanese)
- https://www.town.shodoshima.lg.jp/gyousei/kakuka/shogaigakushuka/2/1/3151.html
Last verified: 2026.09.26
