Abstract: A production method for an edible fermented dairy product using, as a raw material, sterile full fat soy flour and a fermented dairy product produced by the method. A production method for a fermented dairy product includes the steps of: producing sterile full fat soy flour having a grain size of from 100 to 1,000 meshes by pulverizing sterile dehulled soybeans prepared so as to have a bacterial count of 300 cells/g or less by using a method of separating whole soybeans into cotyledons, germs, and hulls; adding water to the sterile full fat soy flour to prepare a powdered soy juice, followed by sterilizing the powdered soy juice by heating; homogenizing the powdered soy juice to prepare a homogenized powdered soy juice; and adding a lactic acid bacterium to the homogenized powdered soy juice, followed by fermentation to prepare fermented milk.

Abstract: There are provided sterile dehulled soybeans bearing bacteria of 300 cells/g or less, and a method for producing efficiently sterilized full fat soy flour using the sterile dehulled soybeans. The full fat soy flour is classified into three kinds: the first one in which deodorization is carried out without damaging available ingredients characteristic of soybeans such as water-soluble proteins and digestion and absorption efficiency is high due to inactivation of a digestion inhibiting enzyme; the second one in which enzymes are alive; and the third one in which all enzymes are inactivated. The method comprises: (a) a sorting step where foreign matters are removed from starting soybeans to obtain sorted soybeans; (b) a dehulling step where germs and hulls are removed from the sorted soybeans to obtain sterile dehulled soybeans; (c) a partially-inactivating steaming step where the sterile dehulled soybeans are steamed for 60 to 300 seconds by hot water or steam heated at a temperature of 70 to 125° C.