However, before a vertical-type rice-milling machine which was developed in 1930's, sake was produced with low level rice polishing technique, that is, with sakamai of high polishing ratio.
しかし1930年代に縦型精米機が登場する以前は、日本酒は低い精米技術、すなわち高い精米歩合の酒米で造られていた。