# The largest islands of Japan: top 20 by area (GSI, 2025)

The 20 largest islands of Japan by area according to the Geospatial Information Authority of Japan (as of 1 January 2025). After the four main islands of Honshu, Hokkaido, Kyushu and Shikoku come Iturup and Kunashir in the disputed Northern Territories, Okinawa Island and Sado.

- 14 votes · 20 items
- Jun 3, 2025 · 吉田 彩花
- https://even.best/en/l/5256/the-largest-islands-of-japan-top-20-by-area-gsi-2025

## Top 20

1. **Shikoku** (3 · ▲3 ▼0) — 18,296.23 km². 4 prefectures.
2. **Kyushu** (2 · ▲2 ▼0) — 36,782.36 km². 7 prefectures.
3. **Amami Ōshima** (2 · ▲2 ▼0) — 712.41 km². Kagoshima.
4. **Awaji** (2 · ▲2 ▼0) — 592.44 km². Hyōgo; the largest island in the Seto Inland Sea.
5. **Iturup (Etorofu)** (1 · ▲1 ▼0) — 3,166.64 km². Hokkaido; one of the Northern Territories disputed with Russia. Japan's northernmost point.
6. **Yakushima** (1 · ▲1 ▼0) — 504.25 km². Kagoshima.
7. **Fukue** (1 · ▲1 ▼0) — 326.36 km². Nagasaki (Gotō Islands).
8. **Tokunoshima** (0 · ▲1 ▼1) — 247.85 km². Kagoshima.
9. **Honshu** (0 · ▲0 ▼0) — 227,938.36 km². Main island; 1 metropolis, 2 urban prefectures and 31 prefectures.
10. **Hokkaido** (0 · ▲0 ▼0) — 77,982.36 km². Hokkaido.
11. **Kunashir (Kunashiri)** (0 · ▲0 ▼0) — 1,489.27 km². Hokkaido; one of the Northern Territories disputed with Russia.
12. **Okinawa Island** (0 · ▲0 ▼0) — 1,208.44 km². Okinawa.
13. **Sado** (0 · ▲0 ▼0) — 854.81 km². Niigata; the largest island in the Sea of Japan.
14. **Tsushima** (0 · ▲0 ▼0) — 695.74 km². Nagasaki.
15. **Amakusa Shimoshima** (0 · ▲0 ▼0) — 574.95 km². Kumamoto.
16. **Tanegashima** (0 · ▲0 ▼0) — 443.67 km². Kagoshima.
17. **Iriomote** (0 · ▲0 ▼0) — 289.62 km². Okinawa.
18. **Shikotan** (0 · ▲0 ▼0) — 247.65 km². Hokkaido; one of the Northern Territories disputed with Russia.
19. **Dōgo (Oki Islands)** (0 · ▲0 ▼0) — 241.53 km². Shimane.
20. **Amakusa Kamishima** (0 · ▲0 ▼0) — 225.85 km². Kumamoto.

How is this ranking ordered? By people's votes: each ▲ adds a point and each ▼ takes one away. Anyone can vote and add what is missing.