Sake yeast Kyokai No. 7 and Sake yeast Kyokai No. 9. among Kyokai-line yeasts played a big role in giving birth to ginjoshu (high-quality sake brewed at low temperatures from rice grains milled to sixty percent weight or less)and junmai ginjoshu that has a fragrance.
香りをもつようになった吟醸酒・純米吟醸酒を誕生させるのに大きな役割を果たしたのは、協会系酵母のなかの協会系酵母協会7号と協会系酵母協会9号であった。