A Building Still Doing Its Job
The Ginjō Brewhouse and Moto Room of Asamai Shuzō (浅舞酒造吟醸蔵及び酛場, Asamai Shuzō Ginjō-gura oyobi Motoba) is an early Shōwa-period sake brewery building at Asamai in Hiraka, Yokote City, Akita Prefecture, entered on the national register of Tangible Cultural Properties on 25 July 2011.
Most listed buildings in Japan have retired. This one has not. Asamai Shuzō has been brewing on this site since 1917, and the two rooms named in the registration are part of the working plant, not a preserved shell with an interpretive panel outside. Rice still goes in. Sake still comes out.
The company's brand is Amanoto (天の戸). The founder, Kakizaki Sōkō, took the name from an old poem alluding to Ama-no-Iwato, the cave into which the sun goddess withdrew in the oldest Japanese myths, and the curved magatama bead that appears on the labels comes from the same source. Since 2011 the brewery has made nothing but junmai sake, brewed from rice and water with no added distilled alcohol. The rice comes from the Yokote basin around the brewery, and since 2024 some of it has been grown in the company's own paddies.
The water matters here too. The brewery draws on groundwater fed by the Minase and Naruse rivers running off the Ōu mountains, known locally as Biwanuma Kansen, a soft water that the Edo-period travel writer Sugae Masumi praised when he passed through this part of Dewa.
Two Rooms, Two Kinds of Wall, One Roof
The registered building occupies the southeast corner of the brewery grounds. It reads as one structure, but it is really two rooms built from two different materials and joined under a single roof line.
The ginjō brewhouse runs east to west with a gabled roof of sheet iron. Its walls are dozō construction: a timber frame packed and rendered with thick earth, the technique used for Japanese storehouses, chosen because a heavy earthen envelope holds temperature steady through the day. Inside there are no partitions. One room, floor to roof.
On the north side the roof does something worth noticing. Rather than stopping at the wall, it sweeps on downward in a continuous slope, a treatment called fuki-oroshi, and the space it covers is the moto room. So the second room is tucked under the skirt of the first.
The moto room is built of stone, and it is divided into two chambers, east and west. Its north face is the elevation to walk around and look at properly. The stone is Innai stone, a tuff quarried at Innai in what is now Yuzawa City to the south, worked by hand with chisel and hammer from the Edo period until after the Second World War. Here it is laid in courses and finished in the manner known as edo-giri, in which a narrow flat margin is dressed around the border of each block so that the joints read as crisp lines across the wall. Three windows are cut into the face. The effect is heavy and deliberate, closer to a bank vault than to a farm outbuilding.
Building area is 165 square metres, single storey throughout.
What Happens in a Motoba
English-language writing about sake tends to jump from rice polishing to fermentation and skip the step in between, which is a pity, because the moto room is where the difficult part happens.
Fermenting sake requires a large, healthy population of yeast and an environment acidic enough to keep stray bacteria out. The moto, also called shubo, is the seed mash that supplies both. Brewers combine steamed rice, kōji mould, and water in a small tank and let lactic acid build up, which drops the pH and clears the field, and only then does the yeast multiply in earnest. That starter is later scaled up in stages into the main fermentation tank. Get the moto wrong and nothing downstream can be corrected.
The step is temperature-sensitive and takes days or weeks. A thick stone room with three small windows, sunk under the roof slope of the neighbouring brewhouse and buried in Yokote snow for much of the winter, is not an accident of design. It is a temperature-control device made of rock.
The adjoining ginjō brewhouse serves the other demanding branch of the craft. Ginjō sake is brewed from heavily polished rice at low temperature over a long, slow fermentation, and it rewards a room that does not swing warm in the afternoon. Amanoto's daiginjō took gold at the National New Sake Appraising competition for five consecutive years from 1990, the first Akita brewery to do so, and again for three consecutive years from 2005.
Why It Was Registered, and How to See It
The registration criterion applied here is the one covering buildings that contribute to the historic landscape of the country. The registration number is 05-0187, issued in the seventieth round, and both the registration and the gazette notice are dated 25 July 2011. Several other buildings on the same site were registered on that day, among them the shop that faces the street at the west end of the grounds and the large brewing and storage houses behind it, so the listing describes a working complex rather than a single monument.
A point of vocabulary that trips up a lot of travel writing: this is a Registered Tangible Cultural Property, not a designated Important Cultural Property. Registration, introduced in 1996, is the lighter of Japan's two systems. It exists precisely so that buildings like this can keep earning their keep, with the owner notifying the authorities before major changes rather than seeking permission for every repair. A brewery that had to stop brewing in order to be protected would not survive.
Practical reality follows from that. Asamai Shuzō is a private company and an operating food-production facility, not a museum. The buildings can be appreciated from the street, and the shop on the grounds sells the sake. Brewery tours have been offered, but by prior arrangement rather than as a walk-in service, and the brewing season places real limits on when outsiders can enter production areas. Contact the company in advance rather than turning up expecting entry, and ask before photographing anything beyond the street elevation.
Asamai lies about twenty minutes by car from JR Yokote Station, with Ugo Kōtsū buses also serving the route. Business hours have been reported as roughly 8:00 to 17:00, though this is a working brewery and hours are best confirmed directly.
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Q&A
- Can I visit the Ginjō Brewhouse and Moto Room at Asamai Shuzō, and are tours available?
- The buildings can be seen from the street, and the shop on the grounds sells Amanoto sake. Brewery tours have been offered by prior arrangement rather than as a walk-in service, and access to production areas is limited during the brewing season. Contact the company before your visit.
- What is the motoba at Asamai Shuzō actually used for?
- A motoba is the room where the seed mash, called moto or shubo, is prepared. Steamed rice, kōji, and water are combined so that lactic acid and then yeast build up before the mixture is scaled into the main fermentation tank. The step is temperature-sensitive, which is why the room is built of thick stone.
- What stone is the moto room of Asamai Shuzō built from?
- Innai stone, a tuff quarried at Innai in present-day Yuzawa City in southern Akita. On the north face it is laid in courses and finished in the edo-giri manner, with a narrow dressed margin worked around each block, and three windows are cut into the wall.
- Is the Ginjō Brewhouse and Moto Room of Asamai Shuzō an Important Cultural Property?
- No. It is a Registered Tangible Cultural Property, registered on 25 July 2011 under registration number 05-0187. Registration is a lighter form of national protection than designation as an Important Cultural Property, and it is designed to let owners continue using the building.
- How do I reach Asamai Shuzō from Yokote Station?
- The brewery is at Asamai in Hiraka, about twenty minutes by car or taxi from JR Yokote Station. Ugo Kōtsū buses also serve the route. The address is 388 Asamai, Asamai, Hiraka-machi, Yokote City.
Basic Information
| Name | Asamai Shuzō Ginjō Brewhouse and Moto Room / 浅舞酒造吟醸蔵及び酛場 |
|---|---|
| Location | 388 Asamai, Asamai, Hiraka-machi, Yokote City, Akita Prefecture |
| Designation | Registered Tangible Cultural Property (Structure); registration no. 05-0187; criterion: contributes to the historic landscape |
| Year Designated | Registered and gazetted 25 July 2011 (70th round) |
| Quantity | 1 building |
| Dimensions | Single storey, earthen storehouse construction and stone construction, sheet-iron roof; building area 165 m² |
| Owner | Asamai Shuzō Co., Ltd. |
| Public Access | Working brewery, privately owned. Exterior visible from the street; shop on site. Tours by prior arrangement only |
References
- National Database of Designated Cultural Properties, Agency for Cultural Affairs: Asamai Shuzō Ginjō Brewhouse and Moto Room
- https://kunishitei.bunka.go.jp/bsys/maindetails/101/00008614
- Cultural Heritage Online: Asamai Shuzō Shop
- https://bunka.nii.ac.jp/heritages/detail/228253
- Cultural Heritage Online: Asamai Shuzō Brewing House, Storage House and Workshop
- https://bunka.nii.ac.jp/heritages/detail/161224
- Akita Sake Brewers Association: Asamai Shuzō (Amanoto)
- https://www.osake.or.jp/kuramoto/31asamai.html
- Akita Sake Brewers Association, Brewery Guide: Asamai Shuzō
- https://osake.or.jp/brewers27/
- Amanoto, Asamai Shuzō official site
- https://amanoto.co.jp/
Last verified: 2026.08.13