Figure 1 shows the contents of total protein, total starch, amylose and amylopectin in the buckwheat samples examined. There were large variations in the contents of these components. The total protein content (g/100g dry matter (DM)) of 30 buckwheat flours ranged from 7.7 to 12.0 with an average of 10.1. The content of total starch (g/100g DM) in the buckwheat samples ranged from 67.8 to 80.7 with an average of 71.0. The content of amylose (g/100g DM) ranged from 23.4 to 29.1 with an average of 25.9, and the content of amylopectin (g/100g DM) ranged from 40.9 to 52.9 with an average of 45.0.