Heated water absorption process A in which the raw rice having a hardness ratio of less than 1 is heated to absorb water, and the weight of the rice grains after water absorption is 2.0 to 2.6 times the weight of the raw rice, Retort sterilized cooked rice having a filling process B for filling the storage container with rice grains, a sealing process D for sealing the filled storage container, and a retort sterilization process E for performing sterilization treatment by heating and pressurizing the sealed storage container And a retort-sterilized container package that has indica rice retort-sterilized and in which an inert gas is sealed in the headspace of the container so that the oxygen gas concentration is less than 1 to 2%. Cooked rice.硬度比が１未満の生米を加熱して吸水させ、吸水後の米粒の重量が生米の重量の２．０～２．６倍となるようにした加熱吸水工程Ａと、加熱吸水後の米粒を収容容器に充填する充填工程Ｂと、充填した収容容器を密封する密封工程Ｄと、密封した収容容器を加熱および加圧することで殺菌処理を行うレトルト殺菌工程Ｅと、を有するレトルト殺菌米飯の製造方法、および、インディカ米をレトルト殺菌した米飯を有し、収容容器におけるヘッドスペースに、酸素ガスの濃度が１～２％未満となるよう不活性ガスを封入してあるレトルト殺菌した容器詰米飯。
