Kanuma Zairai Soba (Tochigi): season, origin and where to buy

Seasonal calendar

The autumn crop is harvested in late October, with new-season soba appearing in November; flour and noodles are available year-round.

Timing shifts with the weather and conditions in each region.

Official registration details (MAFF)

The registered description as published by the Ministry of Agriculture, Forestry and Fisheries.

Characteristics

Kanuma Soba is a local variety of the Kanuma region, and the buckwheat seed is small and fine compared to common buckwheat seeds, which are approximately 80% the size of common buckwheat seeds (3.8 mm to 4.2 mm).Because the buckwheat husk is thin, the ratio of endocarp, which is the basis of the fragrance component, is high, and the peeled buckwheat is rich in fragrance.When made into noodles, Kanuma Soba has a pure, sweet taste owing to its high starch content, and its low protein content gives it a good crispiness.

Link with the production area

Since the land of the production area was thin and it was difficult to grow rice, soba has been produced since the Edo period, and soba became established as a food culture.Because the production area is located at the southern foot of the Nikko mountain range, the climate has large temperature differences, which increases the sweetness of Kanuma Soba and gives it its great taste.In the production area, cultivation areas are selected mainly in stream areas which are divided by mountains to prevent hybridization and to carry on the local variety.

Characteristics and link with the area: Ministry of Agriculture, Forestry and Fisheries website (https://www.maff.go.jp/e/policies/intel/gi_act/register/s136.html)

Where to buy

As a rule, only products that meet the registered standard may use a GI name (with exceptions such as prior use). Check for the GI mark and the place of origin to tell it apart from ordinary products with similar names.

Find on furusato nozei (opens in a new tab)Find online (opens in a new tab)

These links go to Japanese-language shops; check whether they ship overseas.

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It is sometimes sold under the product name "Kosoba."

FAQ

A local heirloom buckwheat passed down in Kanuma, Tochigi, registered as both grain and flour. The small seeds have thin husks, giving the hulled buckwheat a rich aroma, and noodles made from it have a clean sweetness and a pleasantly crisp bite.

Kanuma Zairai Soba is produced in Kanuma City, Tochigi Prefecture.

Kanuma Zairai Soba is in season (harvested or shipped) in Oct–Nov. The autumn crop is harvested in late October, with new-season soba appearing in November; flour and noodles are available year-round.

Look for it via furusato nozei (hometown tax donation) and online shops. Check the GI mark and the place of origin before you buy.

Kanuma Zairai Soba was registered as a Geographical Indication on July 20, 2023 (Registration No. 136). The registered producer group is Kanuma Soba Promotion Association.