Tsubodai (shubo vessel)

Tsubodai is a vessel used for making shubo (yeast starter), and it plays an important role in the traditional sake brewing process. Generally, a tsubodai takes the form of a wooden tub or tank, while shubo is the basic foundation for cultivating yeast. The vessel requires temperature control and oxygen regulation, providing an environment in which shubo ferments easily. Because the tsubodai affects the flavor and quality of sake, it is important for brewers to choose one with its characteristics in mind.