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Japan is an island country of 14,125 islands, of which approximately 260 are inhabited.[1][2] Japan is the fourth-largest island country in the world, behind Australia, Indonesia, and Madagascar.[3] Japan is also the second-most-populous island country in the world, only behind Indonesia.
According to a survey conducted by the Japan Coast Guard in 1987, the number of islands in Japan was 6,852. At that time, the survey only counted islands with coastlines of 100 meters or more that were shown on paper maps. On February 28, 2023, the Geospatial Information Authority of Japan announced that the number of islands had been updated to 14,125 through a recount using digital maps. Since there is no international standard for counting islands, only islands with a coastline of 100 meters or more were counted, as in the past. According to the GSI, advances in surveying technology and the detailed representation of topographic features through digital mapping contributed to this announcement.[4][1]
The four main islands of Japan are:[5][6]
Most of these are located in the East China Sea.
The northern half is administratively part of Kagoshima Prefecture and Kyushu.
The North-Eastern Group:
The North-Western Group:
The Shichi-tō:
The Southern Half, Okinawa Prefecture
The Central Group or Ryukyu proper:
Also known as the Further Isles:
There are four disputed Kuril Islands that are controlled by Russia and claimed by Japan. These islands are called the Chishima Islands.[18]
These are the 50 largest islands of Japan. It excludes the disputed Kuril islands known as the northern territories.
Rank | Island name | Area (km2) |
Area (sq mi) |
Island group |
---|---|---|---|---|
1 | Honshu | 227,960 | 88,020 | |
2 | Hokkaido | 83,424.31 | 32,210.31 | |
3 | Kyushu | 36,782 | 14,202 | |
4 | Shikoku | 18,800 | 7,300 | |
5 | Okinawa Island | 1,207 | 466 | Ryukyu Islands |
6 | Sado Island | 855.26 | 330.22 | |
7 | Amami Ōshima | 712.35 | 275.04 | Amami Islands |
8 | Tsushima Island | 708.7 | 273.6 | |
9 | Awaji Island | 592.17 | 228.64 | Seto Inland Sea islands |
10 | Shimoshima Island, Amakusa | 574.01 | 221.63 | |
11 | Yakushima | 504.88 | 194.94 | Ōsumi Islands |
12 | Tanegashima | 444.99 | 171.81 | Ōsumi Islands |
13 | Fukue Island | 326.43 | 126.04 | Gotō Islands |
14 | Iriomote Island | 289.27 | 111.69 | |
15 | Tokunoshima | 247.8 | 95.7 | Amami Islands |
16 | Dōgojima | 241.58 | 93.27 | Oki Islands |
17 | Kamishima Island, Amakusa | 225.32 | 87.00 | Amakusa islands |
18 | Ishigaki Island | 222.5 | 85.9 | |
19 | Rishiri Island | 183 | 71 | |
20 | Nakadōri Island | 168.34 | 65.00 | Gotō Islands |
21 | Hirado Island | 163.42 | 63.10 | |
22 | Miyako-jima | 158.87 | 61.34 | |
23 | Shōdoshima | 153.30 | 59.19 | |
24 | Okushiri Island | 142.97 | 55.20 | |
25 | Iki Island | 138.46 | 53.46 | |
26 | Suō-Ōshima | 128.31 | 49.54 | |
27 | Okinoerabujima | 93.63 | 36.15 | Amami Islands |
28 | Etajima | 91.32 | 35.26 | |
29 | Izu Ōshima | 91.06 | 35.16 | Izu Islands |
30 | Nagashima Island, Kagoshima | 90.62 | 34.99 | |
31 | Rebun Island | 80 | 31 | |
32 | Kakeromajima | 77.39 | 29.88 | Amami Islands |
33 | Kurahashi-jima | 69.46 | 26.82 | |
34 | Shimokoshiki-jima | 66.12 | 25.53 | |
35 | Ōmishima Island, Ehime | 66.12 | 25.53 | |
36 | Hachijō-jima | 62.52 | 24.14 | |
37 | Kume Island | 59.11 | 22.82 | Okinawa Islands |
38 | Kikaijima | 56.93 | 21.98 | Amami Islands |
39 | Nishinoshima | 55.98 | 21.61 | |
40 | Miyake-jima | 55.44 | 21.41 | |
41 | Notojima | 46.78 | 18.06 | |
42 | Kamikoshiki-jima | 45.08 | 17.41 | |
43 | Ōshima (Ehime) | 41.87 | 16.17 | |
44 | Ōsakikamijima | 38.27 | 14.78 | |
45 | Kuchinoerabu-jima | 38.04 | 14.69 | |
46 | Hisaka | 37.23 | 14.37 | |
47 | Innoshima | 35.03 | 13.53 | |
48 | Nakanoshima (in Kagoshima) | 34.47 | 13.31 | Tokara Islands |
49 | Hario Island | 33.16 | 12.80 | |
50 | Nakanoshima (in Shimane) | 32.21 | 12.44 | Oki Islands |
MILT classification 6,852 islands(main islands: 5 islands, remote islands: 6,847 islands)