Which Prefecture Has The Largest Population In Japan?

Answer

Japan consists of 47 prefectures, with a total population of 126,146,099 including foreigners as of October 1, 2020.

The most populous of these prefectures is Tokyo-to(Area code:13) with 14,047,594 residents (Table 1).

The red-colored area in Figure 1 shows Tokyo-to, where more than 1 in 10 of the total population lives in an area that is not very large compared to other prefectures.

The least populated prefecture is Tottori-ken(Area code:31) with 553,407 people (Table 2, Figure 2).

Note that Figure 1 and Figure 2 are both

  • Okinawa-ken(Area code:47):Only the main island and its surroundings are cropped, enlarged, and then moved.
  • Tokyo-to(Area code:13):Some islands have been removed.
  • Kagoshima-ken(Area code:46):Some islands have been removed.

A true map of Japan that has not been cropped, enlarged, moved, or removed is a Figure 3,Table 3.

Table 1: Top 5 most populous prefectures
Area code Prefecture Population composition ratio(%)
1 13 Tokyo-to 14,047,594 11.1
2 14 Kanagawa-ken 9,237,337 7.3
3 27 Osaka-fu 8,837,685 7.0
4 23 Aichi-ken 7,542,415 6.0
5 11 Saitama-ken 7,344,765 5.8
Figure 1: Map of Japan (Tokyo-to in red)
Table 2: Top 5 least populous prefectures
Area code Prefecture Population composition ratio(%)
43 18 Fukui-ken 766,863 0.6
44 36 Tokushima-ken 719,559 0.6
45 39 Kochi-ken 691,527 0.5
46 32 Shimane-ken 671,126 0.5
47 31 Tottori-ken 553,407 0.4
Figure 2: Map of Japan (Tottori-ken in red)
Table 3: Population of Japan by Prefecture
Area code Prefecture Population composition ratio(%)
1 13 Tokyo-to 14,047,594 11.1
2 14 Kanagawa-ken 9,237,337 7.3
3 27 Osaka-fu 8,837,685 7.0
4 23 Aichi-ken 7,542,415 6.0
5 11 Saitama-ken 7,344,765 5.8
6 12 Chiba-ken 6,284,480 5.0
7 28 Hyogo-ken 5,465,002 4.3
8 01 Hokkaido 5,224,614 4.1
9 40 Fukuoka-ken 5,135,214 4.1
10 22 Shizuoka-ken 3,633,202 2.9
11 08 Ibaraki-ken 2,867,009 2.3
12 34 Hiroshima-ken 2,799,702 2.2
13 26 Kyoto-fu 2,578,087 2.0
14 04 Miyagi-ken 2,301,996 1.8
15 15 Niigata-ken 2,201,272 1.7
16 20 Nagano-ken 2,048,011 1.6
17 21 Gifu-ken 1,978,742 1.6
18 10 Gumma-ken 1,939,110 1.5
19 09 Tochigi-ken 1,933,146 1.5
20 33 Okayama-ken 1,888,432 1.5
21 07 Fukushima-ken 1,833,152 1.5
22 24 Mie-ken 1,770,254 1.4
23 43 Kumamoto-ken 1,738,301 1.4
24 46 Kagoshima-ken 1,588,256 1.3
25 47 Okinawa-ken 1,467,480 1.2
26 25 Shiga-ken 1,413,610 1.1
27 35 Yamaguchi-ken 1,342,059 1.1
28 38 Ehime-ken 1,334,841 1.1
29 29 Nara-ken 1,324,473 1.0
30 42 Nagasaki-ken 1,312,317 1.0
31 02 Aomori-ken 1,237,984 1.0
32 03 Iwate-ken 1,210,534 1.0
33 17 Ishikawa-ken 1,132,526 0.9
34 44 Oita-ken 1,123,852 0.9
35 45 Miyazaki-ken 1,069,576 0.8
36 06 Yamagata-ken 1,068,027 0.8
37 16 Toyama-ken 1,034,814 0.8
38 05 Akita-ken 959,502 0.8
39 37 Kagawa-ken 950,244 0.8
40 30 Wakayama-ken 922,584 0.7
41 41 Saga-ken 811,442 0.6
42 19 Yamanashi-ken 809,974 0.6
43 18 Fukui-ken 766,863 0.6
44 36 Tokushima-ken 719,559 0.6
45 39 Kochi-ken 691,527 0.5
46 32 Shimane-ken 671,126 0.5
47 31 Tottori-ken 553,407 0.4
Figure 3: Map of Real Japan

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