Prefectures by share aged 65+ (2045)

42.3%〜48.3%39.9%〜41.9%38.7%〜39.8%36.7%〜38.6%28.6%〜35.7%

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#	Prefecture	Aged 65+	2020
1	Akita	48.3%	37.5%
2	Aomori	46.4%	33.7%
3	Kochi	44.4%	35.5%
4	Iwate	44.1%	33.6%
5	Tokushima	43.5%	34.2%
6	Yamagata	42.9%	33.8%
7	Wakayama	42.7%	33.4%
8	Fukushima	42.5%	31.7%
9	Nara	42.3%	31.7%
10	Nagasaki	42.3%	33.0%
11	Niigata	41.9%	32.8%
12	Ehime	41.9%	33.2%
13	Hokkaido	41.5%	32.1%
14	Yamaguchi	41.5%	34.6%
15	Yamanashi	41.0%	30.8%
16	Nagano	40.9%	32.0%
17	Toyama	40.7%	32.6%
18	Kagoshima	40.2%	32.5%
19	Miyazaki	39.9%	32.6%
20	Oita	39.8%	33.3%
21	Tottori	39.7%	32.3%
22	Gifu	39.6%	30.4%
23	Fukui	39.3%	30.6%
24	Gunma	39.1%	30.2%
25	Shimane	39.0%	34.2%
26	Ibaraki	38.9%	29.7%
27	Kagawa	38.8%	31.8%
28	Shizuoka	38.7%	30.1%
29	Mie	38.7%	29.9%
30	Tochigi	38.6%	29.1%
31	Hyogo	38.6%	29.3%
32	Saga	38.2%	30.6%
33	Kumamoto	37.9%	31.4%
34	Ishikawa	37.8%	29.8%
35	Miyagi	37.7%	28.1%
36	Kyoto	37.6%	29.3%
37	Okayama	36.9%	30.3%
38	Hiroshima	36.7%	29.4%
39	Osaka	35.7%	27.6%
40	Shiga	35.5%	26.3%
41	Chiba	34.8%	27.6%
42	Saitama	34.7%	27.0%
43	Kanagawa	34.3%	25.6%
44	Fukuoka	34.1%	27.9%
45	Aichi	33.5%	25.3%
46	Okinawa	32.5%	22.6%
47	Tokyo	28.6%	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.