Kyokai No. 15
No.15
Strain Number
No.15
Type
Kyokai (協会酵母)
Origin
National Research Institute of Brewing (2006)
Aroma Profile
Rich and complex aroma with balanced fruit, floral, and spice notes. Combines ethyl caproate (fruity) and isoamyl acetate (banana).
Fermentation Character
Foamless (awa-nashi) variant developed for practical brewing advantages. Eliminates foam overflow without sacrificing aroma quality.
About
A foamless yeast that produces both ethyl caproate and isoamyl acetate in balanced proportions. Foamless yeasts (awa-nashi) are a significant practical innovation — traditional yeasts create thick foam caps during fermentation that can overflow tanks, requiring constant monitoring. K-15 eliminates this problem while maintaining excellent aroma production, making it popular for breweries seeking both convenience and quality.