Natto made by a long-established natto manufacturer in Noboribetsu, Hokkaido, using ultra small grain Hokkaido Yukishizuka soybeans, which are even smaller and rarer than the extra small grain soybeans.
北海道登別の老舗納豆メーカーが、極小粒よりもさらに小さく希少な北海道産ゆきしずか種の超極小粒大豆でつくった納豆。