<;P>;PROBLEM TO BE SOLVED: To provide a method for producing a Sake (rice wine) of concentrated mellowness type having high acidity and to obtain a new yeast strain for realizing the production method. <;P>;SOLUTION: The new yeast strain FERM P-20988 has high productivity of succinic acid, lactic acid and malic acid and low productivity of acetic acid and belongs to Saccharomyces cerevisiae. The method for producing the Sake comprises using the yeast strain. The Sake of concentrated mellowness type having high acidity is produced by using the yeast strain. <;P>;COPYRIGHT: (C)2008,JPO&INPIT