Acid processing wakishi kind is gelatinization processing ones or oxidation wakishi kind of the powder is being the boiled rice revised medicine which includes gelatinization processing ones of the powder, degree of cold water soluble of the particular boiled rice revised medicine in pure water of the 25 , is 50% or more, eye opening 0.5mm in the particular boiled rice revised medicine (32 mesh) content of granular ones on the sieve 5 weight % is under, the aforementioned acid processing wakishi kind for boiled rice revised medicine the whole particular is the powder and the aforementioned oxidation wakishi kind is total of content of the powder, 50 weight % is above, the boiled rice revised medicine.酸処理ワキシー種でん粉の糊化処理物または酸化処理ワキシー種でん粉の糊化処理物を含む米飯改良剤であって、25℃の純水中での当該米飯改良剤の冷水可溶度が、50%以上であり、当該米飯改良剤中の目開き0.5mm(32メッシュ)の篩上の粒状物の含有量が5重量%未満であって、当該米飯改良剤全体に対する前記酸処理ワキシー種でん粉および前記酸化処理ワキシー種でん粉の含有量の合計が、50重量%以上である、米飯改良剤。
