| km2 | Island | % Correct |
|---|---|---|
| 83,423 | Hokkaido | 100%
|
| 227,960 | Honshu | 96%
|
| 36,782 | Kyushu | 88%
|
| 1,207 | Okinawa | 80%
|
| 18,800 | Shikoku | 76%
|
| 592 | Awaji | 36%
|
| 854 | Sado | 36%
|
| 709 | Tsushima | 32%
|
| 712 | Amami Oshima | 16%
|
| 574 | Shimoshima | 12%
|