| Size (Square Kilometers) | Island | % Correct |
|---|---|---|
| 225,800 | Honshu | 93%
|
| 83,423 | Hokkaido | 90%
|
| 36,782 | Kyushu | 73%
|
| 1,206 | Okinawa | 72%
|
| 18,297 | Shikoku | 60%
|
| 708 | Tsushima Island | 19%
|
| 854 | Sado Island | 16%
|
| 712 | Amami Oshima | 12%
|
| 592 | Awaji Island | 12%
|
| 574 | Shimoshima Island | 5%
|