Located in Kumagaya in northern Saitama, known as one of the hottest cities in Japan. The extreme summer heat historically challenged brewers here.

One of the oldest breweries in Ibaraki, tracing its founding to the early Edo period. Located in the mountainous Hitachiota area known for Fukuroda Falls.

Small brewery on the Boso Peninsula in Kamogawa, serving the southern Chiba coast region with local sake.

Located in the historic castle town of Sakura. The area was traditionally a center of commerce and sake brewing in northern Chiba.

Small brewery in the Isumi area of the outer Boso Peninsula coast, producing sake for the local community.

Boso Peninsula brewery located in Futtsu near Tokyo Bay. Produces sake reflecting the local terroir of the Kazusa region.

Located in Noda, a city historically famous for soy sauce (Kikkoman). Some brewing houses produced both soy sauce and sake, reflecting the fermentation culture of the area.

Famous for using flower yeasts (hana kobo) isolated from various flowers like begonias, marigolds, and abelia. Each sake has a unique floral character derived from these natural yeasts.

Located at the foot of Mt. Tsukuba using pristine mountain spring water. The brewery takes pride in small-batch production reflecting the spiritual mountain terroir.

Located in Mito, the capital of Ibaraki and former castle town of the Tokugawa Mito domain. The Ippin brand name means masterpiece. Also produces plum wine using local Mito ume plums.