Table 2.

Soybean cultivars used in this study and their planted area in Japan in 2012–2015^a

Ranking	2012			2013			2014			2015
for	Cultivar	Cultivation area		Cultivar	Cultivation area		Cultivar	Cultivation area		Cultivar	Cultivation area
planted ares		ha	%		ha	%		ha	%		ha	%
1	Fukuyutaka	33,488	24.50	Fukuyutaka	33,467	25.98	Fukuyutaka	34,507	26.22	Fukuyutaka	35,57125.05
2	Enrei	14,756	10.80	Enrei	13,143	10.20	Yukihomare	12,118	9.21	Yukihomare	14,069	9.91
3	Yukihomare	10,764	7.87	Yukihomare	11,745	9.12	Enrei	11,831	8.99	Enrei	11,595	8.17
4	Ryuhou	10,135	7.41	Ryuhou	10,013	7.77	Ryuhou	9,600	7.29	Ryuhou	10,295	7.25
5	Tachinagaha	8,724	6.38	Tachinagaha	8,039	6.24	Tachinagaha	7,485	5.69	Tachinagaha	7,065	4.98
6	Osuzu	4,160	3.04	Miyagishirome	4,760	3.70	Miyagishirome	4,439	3.37	Satonohohoemi	6,635	4.67
7	Miyagishirome	4,137	3.03	Osuzu	4,147	3.22	Satonohohoemi	4,176	3.17	Yukishizuka	5,202	3.66
8	Sachiyutaka	3,335	2.44	Sachiyutaka	3,462	2.69	Osuzu	4,064	3.09	Miyagishirome	4,701	3.31
9	Iwaikuro	3,182	2.33	Toyomusume	3,034	2.36	Yukishizuka	3,791	2.88	Osuzu	4,578	3.22
10	Suzumaru	3,008	2.20	Iwaikuro	3,006	2.33	Sachiyutaka	3,334	2.53	Toyomusume	4,066	2.86
–	Toyomusume	2,817	2.06	Suzumaru	2,048	1.59	Suzumaru	1,940	1.47	Sachiyutaka	3,374	2.38
–	Tanbakuro	2,781	2.03	Tanbakuro	2,861	2.22	Toyomusume	3,325	2.53	Suzumaru	1,906	1.34
–	Nattosyoryu	1,741	1.27	Nattosyoryu	1,643	1.28	Tanbakuro	2,837	2.16	Tanbakuro	2,986	2.10
–	Tamahomare	1,153	0.84	Tamahomare	1,099	0.85	Nattosyoryu	1,410	1.07	Nattosyoryu	1,183	0.83
–	Satonohohoemi	1,102	0.81	Satonohohoemi	2,224	1.73	Tamahomare	1,033	0.78	Tamahomare	951	0.67
–	Suzuyutaka	268	0.20	Hatayutaka	236	0.18	Hatayutaka	274	0.21	Hatayutaka	244	0.17
–	Hatayutaka	238	0.17	Suzuyutaka	207	0.16	Suzuyutaka	120	0.09	Suzuyutaka	11	0.01
–	Others	31,417	22.98	Others	24,109	18.72	Others	25,710	19.54	Others	27,82319.59
–	Total	136,700	100	Total	128,800	100	Total	131,600	100	Total	142,000	100

^aCultivars highlighted in dark and light grey were used in this study. The dark grey-highlighting cultivars were those ranked in top 10 of planted area in Japan. The statistical data was obtained from the governmental official website for Ministry of Agriculture, Forestry and Fisheries of Japan. The cultivation area (ha) represents the sum of the statistics for each cultivar in the data, whereas those for two cultivars: Himeshirazu and Toyokomachi were not determined due to no data available at the website.