Bifuka Shirakaba Brewery is located in Bifuka, Hokkaido, in a renovated 90-year-old brick warehouse. At the attached Restaurant BSB, guests can pair the brewery's craft beer with local jingisukan, and the venue also offers bottle sales and growler-style takeout. It is a brewpub that lets people enjoy both the beer in-house and bottles to go.

The new addition is "OTO" on tap No. 5. In the Instagram post, it is introduced as a black beer made in collaboration with the Otoineppu soba shop, using soba with the husk still on, evoking a local black soba specialty. Another description of the beer notes buckwheat grains from Otoineppu and white birch sap, giving it a soft yet distinctive finish with roasted buckwheat character.

Bifuka Shirakaba Brewery is already known for beers that make use of birch sap, so OTO fits naturally into its lineup while adding a buckwheat-driven twist. This is not a flashy beer; it is one that shows its local ingredients clearly. For drinkers who like to follow the character of a brew from aroma to finish, Restaurant BSB is the right place to catch it with food.