Ikkaku is produced by Urakawa Shuzo, a brewery established during the Bunka-Bunsei era (1804-1830) on the Shimabara Peninsula in Nagasaki Prefecture, a region with deep-rooted sake brewing traditions. The brand covers a range of expressions including nama (unpasteurized), namagenshu (undiluted raw sake), junmai, and ginjo styles, reflecting a commitment to breadth within a historically grounded regional context. As one of the older surviving breweries in Nagasaki, Urakawa Shuzo carries the heritage of Shimabara brewing culture into its current lineup.
