Table 1.

Trends of Hansen’s disease in Japan by 5-year periods between 1947 and 2020.

Period	Japan (ALL)	Mainland				Okinawa				Nonautochthonous
	New cases (a+b+c)	New cases (a)	Child (<15 years) %	Female%	Mean incidence rate (/100,000 population)	New cases (b)	Child (<15 years) %	Female%	Mean incidence rate (/100,000 population)	New cases (c)
1947–1950	3121	2701	NR	NR	0.8361	420	14%	35%	17.9327	NR
1951–1955	2062	1792	NR	NR	0.4133	270	19%	29%	6.3454a	NR
1956–1960	1927	1558	NR	NR	0.3398	369	17%	36%	8.6485	NR
1961–1965	1292	804	NR	NR	0.1680	477	21%	32%	10.3916	11b
1966–1970	956	315	6%	42%	0.0623	623	23%	40%	13.1216	18
1971–1975	531	165	13%	38%	0.0304	352	18%	41%	7.1183	14
1976–1980	280	86	17%	49%	0.0149	188	7%	43%	3.4856	6
1981–1985	196	57	12%	39%	0.0095	132	5%	41%	2.3023	7
1986–1990	129	48	4%	42%	0.0078	71	1%	31%	1.1815	10
1991–1995	93	19	0%	47%	0.0030	28	0%	46%	0.4475	46
1996–2000	81	14	0%	50%	0.0022	17	0%	35%	0.2619	50
2001–2005	55	9	0%	56%	0.0014	8	0%	25%	0.1194	38
2006–2010	32	3	0%	0%	0.0005	2	0%	50%	0.0291	27
2011–2015	24	1	0%	0%	0.0002	4	0%	50%	0.0567	19
2016–2020	17	1	0%	0%	0.0002	1	0%	100%	0.0139	15
Total	10,796	7573				2962				261

NR, no report.

^aCalculated from population data of Okinawa from 1952–1955 due to unavailability of data for 1951.

^bSum of cases for 1964 and 1965.