Table 1.

Annual live births, live births with low birth weight (LBW: birth weight < 2500 g), and LBW proportions (LBWp) in Japan stratified by exposure status of prefectures; see Table 3 and Fig. 2; Table 1 excludes 3774 live births (including 197 LBWs, 5.2%) to Japanese parents in foreign countries; see https://www.mhlw.go.jp/english/database/db-hw/vs01.html

Year	5 highly contaminated prefectures Fukushima, Miyagi, Ibaraki, Tochigi, Iwate			5 moderately contaminated prefectures Yamagata, Saitama, Tokyo, Kanagawa, Chiba			37 slightly contaminated prefectures with ISO codes 1, 2, 5, 10, 15 to 47			Total
	live births	LBW	LBWp	live births	LBW	LBWp	live births	LBW	LBWp	live births	LBW	LBWp
1995	103,490	7869	0.0760	311,160	23,216	0.0746	772,147	58,016	0.0751	1,186,797	89,101	0.0751
1996	104,322	7550	0.0724	315,799	23,712	0.0751	786,132	59,611	0.0758	1,206,253	90,873	0.0753
1997	102,020	7899	0.0774	312,979	24,415	0.0780	776,360	61,502	0.0792	1,191,359	93,816	0.0787
1998	103,271	8165	0.0791	315,199	25,278	0.0802	784,388	64,157	0.0818	1,202,858	97,600	0.0811
1999	101,549	8349	0.0822	310,282	25,817	0.0832	765,596	64,989	0.0849	1,177,427	99,155	0.0842
2000	102,092	8825	0.0864	315,728	27,073	0.0857	772,517	66,980	0.0867	1,190,337	102,878	0.0864
2001	100,806	8672	0.0860	311,095	26,595	0.0855	758,563	67,600	0.0891	1,170,464	102,867	0.0879
2002	98,515	8614	0.0874	311,474	28,049	0.0901	743,671	67,641	0.0910	1,153,660	104,304	0.0904
2003	95,674	8576	0.0896	304,896	27,602	0.0905	722,870	66,133	0.0915	1,123,440	102,311	0.0911
2004	93,692	8608	0.0919	303,562	28,218	0.0930	713,291	67,995	0.0953	1,110,545	104,821	0.0944
2005	89,016	8258	0.0928	292,414	27,402	0.0937	680,930	65,601	0.0963	1,062,360	101,261	0.0953
2006	90,578	8495	0.0938	303,268	28,632	0.0944	698,652	67,421	0.0965	1,092,498	104,548	0.0957
2007	89,317	8528	0.0955	304,808	28,714	0.0942	695,533	67,913	0.0976	1,089,658	105,155	0.0965
2008	88,826	8394	0.0945	307,184	29,090	0.0947	694,973	66,986	0.0964	1,090,983	104,470	0.0958
2009	86,431	8053	0.0932	304,949	28,711	0.0942	678,556	65,905	0.0971	1,069,936	102,669	0.0960
2010	85,459	8214	0.0961	305,933	28,864	0.0943	679,787	65,960	0.0970	1,071,179	103,038	0.0962
2011	81,576	7808	0.0957	299,020	28,129	0.0941	670,088	64,433	0.0962	1,050,684	100,370	0.0955
2012	80,622	7885	0.0978	296,914	28,026	0.0944	659,628	63,399	0.0961	1,037,164	99,310	0.0958
2013	80,672	8087	0.1002	298,278	28,081	0.0941	650,812	62,454	0.0960	1,029,762	98,622	0.0958
2014	78,704	7643	0.0971	294,105	27,341	0.0930	630,665	60,778	0.0964	1,003,474	95,762	0.0954
2015	78,014	7543	0.0967	297,591	27,429	0.0922	630,019	60,229	0.0956	1,005,624	95,201	0.0947
2016	74,931	7280	0.0972	289,991	26,874	0.0927	611,991	57,925	0.0947	976,913	92,079	0.0943
2017	72,500	6989	0.0964	281,503	25,974	0.0923	592,011	56,388	0.0952	946,014	89,351	0.0944
2018	69,184	6656	0.0962	275,332	25,345	0.0921	573,845	54,266	0.0946	918,361	86,267	0.0939
Total	2,151,261	192,960	0.0897	7,263,464	648,587	0.0893	16,743,025	1,524,282	0.0910	26,157,750	2,365,829	0.0904