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Table 1 Rice cultivation in 2016 in Japan (source: Rice Stable Supply Support Organization website)

From: Koshihikari: a premium short-grain rice cultivar – its expansion and breeding in Japan

No. Variety Share (%) Cross Year developed
1 Koshihikari 36.2 1956
2 Hitomebore 9.6 Koshihikari/Hatsuboshi 1991
3 Hinohikari 9.1 Kobanebare/Koshihikari 1989
4 Akitakomachi 7.0 Koshihikari/Ouu 292 1984
5 Nanatsuboshi 3.5 Hitomebore/Kukei 90242A//Kuiku 150 2001
6 Haenuki 2.8 Shonai 29/Akitakomachi 1991
7 Kinuhikari 2.5 Shu 2800/Hokuriku 100//Hokuriku 96 1988
8 Massigura 1.8 Ouu 341/Yamagata 40 2005
9 Asahi no yume 1.6 Aichi 70//Aichi 56/Aichi 65 1996
10 Yumepirika 1.5 Satsukei 96118/Jouiku 427 2008
Total   75.6  
  1. Hokuriku 100: gamma-ray mutant of Koshihikari
  2. Shu 2800: a descendant of IR8 and Koshihikari
  3. Ouu 341: a grandchild of Koshihikari