Kozaemon Junmai Ginjo Bizen Omachi (720 ml)

Founded in 1702 by Nakashima Kozaemon in Mizunami City, Gifu, this brewery made a deliberate market transgression when it launched its modern range: championing umakuchi — rich, umami-forward sake — at a moment when Japan's mainstream had spent three decades chasing the light, dry tanrei karakuchi ideal. The Bizen Omachi Junmai Ginjo is the expression that most nakedly reveals that philosophy.

Bizen Omachi is one of Japan's oldest cultivated sake rice varieties, grown in Okayama Prefecture's warm, low-humidity Kibi Plain — a terroir that produces large, starchy grains with a pronounced savory core and lower protein periphery than Yamada Nishiki. That grain character translates directly into the sake's structural weight and earthy depth.

Production at Mizunami draws on natural underground spring water fed by snowmelt from Mt. Byobu, soft and mineral-lean, which preserves the rice's own flavor compounds. Kozaemon employs a yamahai lactic starter — a labor-intensive, ambient-culture method that builds wild acidity and layered umami — combined with four-stage (yodan) fermentation, adding a fourth rice-and-water addition beyond the standard three-stage sandan shikomi to amplify extraction. Koji is cultivated at approximately 98% humidity to maximize enzyme activity. Polish ratio sits at the Ginjo threshold (≤60% seimaibuai), preserving more of the grain's umami-rich interior than a daiginjo cut would allow.

The use of yamahai in a ginjo-grade expression is the rule-break here: most producers reserve ambient-culture starters for junmai tiers, not the cleaner ginjo register. The result is a sake that carries ginjo aromatic lift alongside a savory, almost aged-rice depth that few peers at this polish level achieve.