Table 1.

Cumulative number of COVID-19 cases in Japan, monthly inbound visitors from China in January 2020, and old-age dependency ratio in 2019

Prefecture	Mean temperature in February 2020	COVID-19 cases per 1,000,000 population on March 17, 2020	Inbound visitors from China per 1,000 population in January 2020	Old-age dependency ratio in 2019
Hokkaido	−2.1	26.7	11.1	53.3
Aomori	0.9	0	0.1	56.0
Iwate	1.0	0	0.7	57.1
Miyagi	4.4	0.4	0.6	44.9
Akita	2.5	0.9	0	66.0
Yamagata	2.5	0	0.002	58.2
Fukushima	4.5	1.0	0	51.9
Ibaraki	6.2	0	2.02	47.4
Tochigi	5.8	1.0	0	46.1
Gunma	6.6	2.5	0	48.8
Saitama	6.2	3.6	0	41.9
Chiba	8.9	4.7	35.3	43.6
Tokyo	8.3	6.4	8.64	34.3
Kanagawa	8.9	5.3	0	39.5
Niigata	5	5.9	0.8	55.3
Toyama	5.5	0	1.1	55.0
Ishikawa	6.3	4.3	1.1	49.2
Fukui	5.9	0	0	50.9
Yamanashi	6.4	2.3	0	50.7
Nagano	2.4	1.4	0	54.2
Gifu	7	1.0	0	50.2
Shizuoka	9.4	0.8	2.6	49.4
Aichi	7.1	15.8	11.5	39.6
Mie	7.5	2.7	0	49.1
Shiga	5.9	1.4	0	42.1
Kyoto	6.9	5.3	0	48.5
Osaka	8	10.2	37.09	43.8
Hyogo	8.2	9.8	0.01	46.9
Nara	6.3	2.9	0	52.5
Wakayama	8.3	13.0	0	56.6
Tottori	6.6	0	1.0	55.1
Shimane	6.4	0	0	61.6
Okayama	6.7	0	0.6	51.1
Hiroshima	7.8	0.3	0.9	48.9
Yamaguchi	7.3	0.7	0.002	61.5
Tokushima	8.4	0	0.006	57.1
Kagawa	7.6	0	2.6	53.4
Ehime	8.4	0.7	0.2	56.7
Kochi	9	14.4	0	62.6
Fukuoka	9.7	0.56	4.5	45.1
Saga	8.8	1.2	4.1	51.1
Nagasaki	9.8	0	0.4	56.3
Kumamoto	8.9	2.8	0.09	53.5
Oita	8.7	0.8	0.003	57.1
Miyazaki	10.4	0.9	0.02	56.0
Kagoshima	11.4	0	0.6	55.4
Okinawa	18.7	2.2	16.6	34.6

COVID-19; novel coronavirus infection.