Prefectures by share aged 0–14 (2025)

11.8%〜15.6%11.2%〜11.7%10.7%〜11.0%10.3%〜10.7%8.7%〜10.3%

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#	Prefecture	Aged 0–14	2020
1	Okinawa	15.6%	16.6%
2	Saga	12.6%	13.5%
3	Shiga	12.5%	13.6%
4	Kumamoto	12.5%	13.2%
5	Fukuoka	12.3%	13.0%
6	Kagoshima	12.3%	13.1%
7	Miyazaki	12.2%	13.1%
8	Aichi	12.0%	13.0%
9	Hiroshima	11.8%	12.6%
10	Nagasaki	11.8%	12.5%
11	Tottori	11.7%	12.4%
12	Shimane	11.6%	12.2%
13	Fukui	11.5%	12.5%
14	Okayama	11.5%	12.4%
15	Hyogo	11.3%	12.2%
16	Ishikawa	11.2%	12.1%
17	Gifu	11.2%	12.3%
18	Kagawa	11.2%	12.1%
19	Oita	11.2%	12.1%
20	Saitama	11.0%	11.9%
21	Mie	11.0%	12.1%
22	Nagano	10.9%	12.0%
23	Shizuoka	10.9%	12.1%
24	Miyagi	10.8%	11.7%
25	Chiba	10.8%	11.7%
26	Kanagawa	10.8%	11.8%
27	Osaka	10.8%	11.7%
28	Nara	10.8%	11.7%
29	Tokyo	10.7%	11.2%
30	Wakayama	10.7%	11.4%
31	Ibaraki	10.6%	11.7%
32	Tochigi	10.6%	11.8%
33	Yamanashi	10.6%	11.4%
34	Yamaguchi	10.6%	11.5%
35	Ehime	10.6%	11.6%
36	Gunma	10.5%	11.7%
37	Kyoto	10.5%	11.4%
38	Fukushima	10.3%	11.3%
39	Niigata	10.3%	11.3%
40	Toyama	10.3%	11.2%
41	Yamagata	10.2%	11.3%
42	Tokushima	10.1%	10.9%
43	Kochi	10.0%	10.9%
44	Iwate	9.9%	11.0%
45	Hokkaido	9.8%	10.7%
46	Aomori	9.6%	10.5%
47	Akita	8.7%	9.7%

Source: processed from the National Institute of Population and Social Security Research, Regional Population Projections for Japan (2023) (https://www.ipss.go.jp/pp-shicyoson/j/shicyoson23/t-page.asp). 2020 is the census; 2025 onwards are projections.