Alps Yeast (AK-1)
AK-1
Strain Number
AK-1
Type
Proprietary (自社酵母)
Origin
Nagano Prefecture Brewing Research Center
Aroma Profile
Delicate green apple and white flower aroma with herbal freshness. Lighter and more transparent than K-9.
Fermentation Character
Clean fermentation producing light-bodied sake with elegant acidity. Well-suited to Nagano's clean water sources.
About
Developed by Nagano Prefecture's research center, the Alps Yeast produces sake with the crisp, transparent quality that defines the prefecture's brewing character. Named after the Japanese Alps that tower over the region, this yeast creates delicate, clean sake that reflects the pristine mountain water used in brewing. Popular among Nagano's breweries and increasingly adopted by brewers nationwide seeking a lighter ginjo style.