As to eating rice, rice having 70% or higher seiryu-buai is classified as itto-mai (first-class rice), that having 60% or higher seiryu-buai is classified as nito-mai (second-class rice), and that having 45% or higher seiryu-buai is classified as santo-mai (third-class rice).
食用米においては、整粒歩合70%以上を一等米、60%以上を二等米、45%以上を三等米とする。