Prefectures by share aged 65+ (2040)

40.3%〜45.9%38.5%〜40.2%37.2%〜38.4%35.3%〜37.0%27.3%〜34.2%

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#	Prefecture	Aged 65+	2020
1	Akita	45.9%	37.5%
2	Aomori	43.9%	33.7%
3	Kochi	42.5%	35.5%
4	Iwate	41.8%	33.6%
5	Tokushima	41.7%	34.2%
6	Wakayama	41.2%	33.4%
7	Yamagata	40.9%	33.8%
8	Nagasaki	40.9%	33.0%
9	Nara	40.6%	31.7%
10	Fukushima	40.3%	31.7%
11	Ehime	40.2%	33.2%
12	Yamaguchi	40.0%	34.6%
13	Niigata	39.9%	32.8%
14	Hokkaido	39.7%	32.1%
15	Yamanashi	39.6%	30.8%
16	Nagano	39.2%	32.0%
17	Toyama	39.1%	32.6%
18	Kagoshima	38.8%	32.5%
19	Miyazaki	38.5%	32.6%
20	Oita	38.4%	33.3%
21	Tottori	38.2%	32.3%
22	Gifu	37.9%	30.4%
23	Shimane	37.8%	34.2%
24	Fukui	37.6%	30.6%
25	Gunma	37.5%	30.2%
26	Kagawa	37.3%	31.8%
27	Ibaraki	37.2%	29.7%
28	Shizuoka	37.2%	30.1%
29	Mie	37.2%	29.9%
30	Hyogo	37.0%	29.3%
31	Tochigi	36.9%	29.1%
32	Saga	36.7%	30.6%
33	Kumamoto	36.7%	31.4%
34	Ishikawa	36.4%	29.8%
35	Kyoto	35.9%	29.3%
36	Okayama	35.5%	30.3%
37	Miyagi	35.4%	28.1%
38	Hiroshima	35.3%	29.4%
39	Osaka	34.2%	27.6%
40	Shiga	33.7%	26.3%
41	Chiba	33.5%	27.6%
42	Saitama	33.3%	27.0%
43	Kanagawa	32.9%	25.6%
44	Fukuoka	32.7%	27.9%
45	Aichi	31.9%	25.3%
46	Okinawa	30.8%	22.6%
47	Tokyo	27.3%	22.7%

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.