A Meiji brewery building at the centre of Shodoshima's soy sauce quarter
Yamayoshi Shoyu Moromi-gura (山吉醤油諸味蔵, also written Yamayoshi Shōyu Moromigura), the mash warehouse of the former Yamayoshi soy sauce brewery at Imasaka in the Noma district of Shodoshima Town, Kagawa Prefecture, was built in 1888 and entered on Japan's national register of Tangible Cultural Properties on 9 February 2005.
The building runs north to south on a plot that a small watercourse cuts across, with the mash warehouse on the southern side of the channel and a detached residence beyond it to the south. It measures roughly 24 metres along the ridge and 10 metres across, a single-storey timber structure with a gabled roof of pantiles and a registered footprint of 238 square metres. That is a long, low, deliberately plain shape, and it was arrived at by function rather than by design ambition.
Inside, the building does two different jobs. The southern half holds the moromi vats, the great cedar tubs in which steamed soybeans, roasted wheat, koji mould and salt water are left to ferment for a year or more. The northern half was given over to bottling. One end of the room smells of fermentation; the other end was where the finished liquid left the premises.
Yamayoshi Shoyu stopped brewing in 2002. Shokin Shoyu, a neighbouring maker with which the family had long been on close terms, took over the buildings and resumed production in them, and the site is known within that company as the Yamayoshi kura. It sits on slightly higher ground than the other cellars in the district, which keeps it a little cooler, and Shokin uses it particularly for usukuchi, the pale-coloured soy sauce of western Japan.
Why the building was registered
Registration was granted under the criterion that the building contributes to the historic landscape of the country. Its register number is 37-0258, and it was announced in the official gazette on 28 February 2005 as part of the 45th round of registrations.
The exterior explains the criterion better than any citation. The lower part of the wall is clad in vertical boards of yakisugi, cedar whose surface has been charred to resist rot and insects, and the upper part is finished in white lime plaster. Black below, white above. Repeat that treatment across a dozen brewery buildings standing shoulder to shoulder along narrow lanes, and you have the visual signature of Hishio-no-Sato, the soy sauce quarter of eastern Shodoshima.
Soy sauce brewing on the island is conventionally traced to the Bunroku era of the 1590s, when quarrying crews working the island's granite for Osaka Castle are said to have brought the seasoning up from Yuasa in Kishu. The island already had salt, and its harbours could bring in the soybeans and wheat it could not grow. According to the Shodoshima Soy Sauce Cooperative Association, the number of brewing households on the island reached about 400 between 1878 and 1886, with an annual mash volume of some 35,000 koku. Around twenty makers remain today. The Yamayoshi mash warehouse belongs to the tail end of that boom, and its survival in working condition is the reason it stands on the register rather than in a photograph album.
The wider context was recognised again in September 2021, when the soy sauce brewing techniques of Sanuki, the old province that corresponds to Kagawa, became the first entry ever made on the national register of Intangible Folk Cultural Properties.
What to look for from the lane
Two details on the roofline repay a moment of attention. Along the southern half, a row of high windows is set just under the eaves. These are not decorative. Fermentation needs air movement without direct sunlight on the vats, and clerestory windows placed above head height give ventilation and diffuse light at the same time. On the northern ridge, over the bottling floor, a raised vent called a kemudashi lifts steam and heat out of the building.
Look at the wall boards closely and the charring is still legible on the surface, a fine alligatored texture that catches low afternoon light. Yakisugi weathers to a soft grey-black rather than a flat black, and the contrast against the plaster above changes noticeably between an overcast morning and a clear evening.
Stone appears everywhere in this landscape, and not by accident. Shodoshima granite was shipped to Osaka Castle, and the same stone was cut into the weights that were stacked on the lids of moromi vats to press the mash. Blocks of it still sit around the breweries of Hishio-no-Sato, which is why the quarter forms part of the Japan Heritage story built around the stone islands of the Seto Inland Sea.
One practical point. This is a working brewery, not a museum. The interior is not open to casual visitors, and the vats are in daily use. Shokin Shoyu has accepted cellar visits by prior arrangement on weekdays, so anyone hoping to see inside should contact the company in advance rather than turning up. The exteriors can be seen from the public lane, and photographing them from the road is not restricted, though the buildings stand on private ground and the working yards should be left alone.
For an interior that is genuinely set up for visitors, the Marukin Soy Sauce Memorial Museum lies in the same Noma district and is open daily from 9:00 to 16:00 with a small admission charge. It occupies a former brewing hall of 1908 to 1909 that is itself a registered Tangible Cultural Property, and a nearby fermentation cellar has a viewing gallery over the wooden vats. From Sakate Port the museum is about three minutes by car, from Kusakabe Port about ten, and from Tonosho Port about thirty; the Olive Bus Sakate line stops at Marukin-mae. The Yamayoshi buildings stand a short walk away within the same quarter.
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Q&A
- Can visitors go inside Yamayoshi Shoyu Moromi-gura?
- Not as a walk-in. The building is an operating fermentation cellar used by Shokin Shoyu, and there is no ticket desk or visitor entrance. The company has accepted cellar visits by advance reservation on weekdays, so contact Shokin Shoyu directly if you want to see the interior. The exterior is visible from the public lane at any time.
- Is Yamayoshi Shoyu Moromi-gura still used for brewing?
- Yes. Yamayoshi Shoyu closed in 2002 and Shokin Shoyu took the buildings over, restarting production in them. Because the site sits slightly higher and runs a little cooler than the other cellars in the district, it is used in particular for pale usukuchi soy sauce.
- How old is Yamayoshi Shoyu Moromi-gura, and how large is it?
- It dates from 1888. The single-storey timber building is about 24 metres long and 10 metres deep, with a gabled pantile roof and a registered building area of 238 square metres.
- What is the difference between a registered Tangible Cultural Property and a National Treasure in the case of Yamayoshi Shoyu Moromi-gura?
- Registration is a lighter form of protection introduced in 1996 for buildings roughly fifty years old or more, aimed at keeping them in active use. Owners must notify the authorities before major alterations but are not tied to the strict controls that apply to designated Important Cultural Properties or National Treasures. That flexibility is why this mash warehouse can continue to hold vats of fermenting soy sauce.
- How do I reach the area around Yamayoshi Shoyu Moromi-gura?
- Shodoshima is reached by ferry, most conveniently at Sakate Port from Kobe or Takamatsu, or at Kusakabe Port. The Noma district lies on the eastern side of the island; the Olive Bus Sakate line serves the Marukin-mae stop, and the soy sauce quarter is laid out as a walking route from there. Driving times to the Marukin Soy Sauce Memorial Museum are about three minutes from Sakate, ten from Kusakabe and thirty from Tonosho.
Basic Information
| Name | Yamayoshi Shoyu Moromi-gura (山吉醤油諸味蔵) |
|---|---|
| Location | 710 Ko, Imasaka, Noma, Shodoshima Town, Shozu District, Kagawa Prefecture |
| Designation | Registered Tangible Cultural Property (Structure), register no. 37-0258 |
| Year Designated | Registered 9 February 2005; gazetted 28 February 2005 (45th round) |
| Quantity | 1 building |
| Dimensions | Approx. 24 m along the ridge by 10 m deep; building area 238 m²; single-storey timber, gabled, pantile roof |
| Owner | Not published in the Agency for Cultural Affairs database; the buildings are used by Shokin Shoyu Co., Ltd. |
| Public Access | Working brewery. No general admission; exterior visible from the public lane. Cellar visits have been accepted by advance arrangement on weekdays. |
References
- National Cultural Properties Database, Agency for Cultural Affairs — Yamayoshi Shoyu Moromi-gura
- https://kunishitei.bunka.go.jp/heritage/detail/101/00004666
- Cultural Heritage Online — Yamayoshi Shoyu Moromi-gura
- https://bunka.nii.ac.jp/heritages/detail/180886
- Shokin Shoyu Co., Ltd. — Company profile
- https://shokinshoyu.jp/company/
- Shodoshima Town — Modern industrial heritage of Hishio-no-Sato
- https://www.town.shodoshima.lg.jp/gyousei/kakuka/shogaigakushuka/2/1/3151.html
- Shodoshima Soy Sauce Cooperative Association — History of Shodoshima soy sauce
- https://shima-shoyu.com/history/
- Japan Heritage Portal — Soy sauce cellars and stone tools of Hishio-no-Sato
- https://japan-heritage.bunka.go.jp/ja/culturalproperties/result/4568/
- Morita Co., Ltd. — Marukin Soy Sauce Memorial Museum
- https://marukin.moritakk.com/kinenkan/
Last verified: 2026.08.09