Roughly speaking, usually square mochi are used in the prefectures of Niigata, Nagano, Gifu, Mie, and areas to the east while either square or round mochi are used in the prefectures of Toyama, Ishikawa, and Fukui; and in the regions to the west round ones are used.
おおむね新潟・長野・岐阜・三重県以東は角餅で富山・石川・福井は混在、それより西は丸餅である。