To provide a storage bag for rice having a rice grain having a short cooking time, a rice rice having an excellent texture of cooking and having excellent preservability, easy to cook, effective provide.SOLUTION: A storage bag of rice grains made of paper or cloth or plastic is irradiated with resonance electromagnetic waves of 32 to 38 terahertz, the storage bag itself is made a resonance electromagnetic wave transfer radiator, radiated from the storage bag Transfer resonance By the resonance action of the electromagnetic wave 14, the hydrogen bond of the rice grain starchy 11 contained in the storage bag is divided to be alpha rice.(FIG.【課題】湯戻り時間が短く、炊き立ての優れた食感を有する米飯となり、かつ保存性に優れたアルファ米とすることができ、調理法が簡単で、効果が明確な米粒の収納袋を提供する。【解決手段】通常の紙製または布製またはプラスチック製の米粒の収納袋12に、32~38テラヘルツの共鳴電磁波を照射し、収納袋自体を、共鳴電磁波の転写放射体とし、収納袋から放射される転写共鳴電磁波14の共振作用で、収納袋に入っている米粒のでんぷん質11の水素結合を分断し、アルファ米とする。【選択図】図2
