With the insulative device nutrition enriched until it becomes the average percentage of water content which is suited for mothballing it makes nutrition enriched process S2 and the nutrition enriched chaff dry 3 where, as for nutrition enriched American production method, harvest S1 and the average percentage of water content which harvest the raw chaff 2 which becomes the raw materials from the field 20 weight % heat the raw chaff 2 which to specified level above is with the microwave heating device, form nutrition enriched chaff 3 by insulating over predetermined time the rice huller does and removes the chaff, spirit does and removes the embryo bud and rice bran layer, amino butyric acid it contains abundantly in the endospermIt possesses with the dry rice huller spirit process S3 which obtains milled rice 4.栄養富化米製造方法は、原料となる生籾2を圃場から収穫する収穫S1と、平均含水率が20重量%以上の所定の水準にある生籾2をマイクロ波加熱装置によって加熱し、保温装置によって所定時間にわたって保温することにより栄養富化籾3を生成する栄養富化工程S2と、栄養富化籾3を長期保存に適した平均含水率になるまで乾燥させ、籾摺りして籾殻を除去し、搗精して胚芽及び糠層を除去し、γ-アミノ酪酸を胚乳部に豊富に含有する栄養富化白米4を得る乾燥・籾摺り・搗精工程S3とを有する。
