Senkin is a local brewery with a history dating back to 1806. However, the two young brothers Usui have completely changed the postwar legacy of their forefathers. They have radically downsized production volume and have returned to such traditional elements as wooden tanks, kimoto and yamahai slow-brew, and extremely slow pressing. Almost all Senkin sake are unpasteurised, unfiltered and undiluted. Motivated by a strong urge to do things differently from others, they have developed a new formula of sweet-and-sour sake.