Shimaoka Shuzo, founded in 1863 in Ota City, Gunma Prefecture, brews Gunmaizumi using spring water from Mount Akagi and locally grown sake rice, relying almost exclusively on the traditional yamahai method with naturally resident brewery yeast rather than added starters. The brewery's commitment to standard, year-round products rather than seasonal releases reflects a philosophy of steady, unhurried craftsmanship. Gunmaizumi is prized by enthusiasts for its vivid acidity and deep, richly mellow flavor.
