PROBLEM TO BE SOLVED: To provide a soymilk lactic acid fermentation product in which unique unpleasant soybean smell is reduced.SOLUTION: There is provided the soymilk lactic acid fermentation product obtained by fermenting soymilk to which a branched chain amino acid is added by a lactic acid bacterium in which diacetyl production by lactic acid fermentation is suppressed.COPYRIGHT: (C)2012,JPO&INPIT【課題】独特の不快な大豆臭が軽減された豆乳乳酸発酵物を提供する。【解決手段】分岐鎖アミノ酸が添加された豆乳を乳酸菌により発酵させて得られる、乳酸発酵によるジアセチル生成の抑制された豆乳乳酸発酵物を提供する。【選択図】なし