The present invention relates to boiled rice improving agent characterized by containing an extract obtained by solvent extraction immature soybean after heat treatment, as well as to cooked rice, rice processed foods that rice modifier is blended. According to rice improving agent of the present invention, low-cost rice, old rice, in addition that it is possible to reduce the unpleasant odor which has imported rice, etc., it is possible to improve the flavor, taste, appearance when cooked the rice (gloss). Moreover, cooked rice obtained by blending the boiled rice improving agent of the present invention, fresh feeling lasts even cold, can be suitably used for lunch and rice balls and the like applications.本発明は、未成熟大豆を加熱処理後に溶媒抽出して得られる抽出物を含むことを特徴とする米飯改良剤、並びに、該米飯改良剤が配合された米飯類・米加工食品類に関する。本発明の米飯改良剤によれば、低価格米、古米、輸入米等が有する不快臭を軽減できるほか、当該米を調理した際の風味・食味・外観(つや)を改善することができる。また、本発明の米飯改良剤を配合した米飯類は、冷めてもフレッシュ感が持続し、弁当やおにぎり等の用途に好適に用いることができる。
