Kan-jikomi (Winter Preparation)

Kan-jikomi harnesses winter cold for brewing. Ideally, preparation begins around Daikan (late January). In cold environments, unwanted bacteria are suppressed and target microorganisms work slowly, producing clean flavors with minimal off-notes. As spring temperatures rise, fermentation accelerates, continuing through summer to finish in autumn. Using the four seasons' temperature cycle as a fermentation timeline, this method is brewing wisdom born of Japan's climate. As the character for cold suggests, winter air is a natural sterilizer suppressing unwanted bacteria. The natural timeline of fermentation accelerating with spring works only because of Japan's four seasons—brewing wisdom born of climate.