| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| 洞 | city | Aomori | Japan | 40.52 | 141.40 | 55 | 71869 |
| 洞ヶ原 | city | Kagoshima | Japan | 31.11 | 130.83 | 1030 | 3732 |
| 洞内 | city | Aomori | Japan | 40.66 | 141.20 | 193 | 25042 |
| 洞北町 | city | Fukuoka | Japan | 33.88 | 130.74 | 9 | 231892 |
| 洞南町 | city | Fukuoka | Japan | 33.87 | 130.75 | 9 | 252230 |
| 洞口 | city | Gunma | Japan | 36.57 | 138.60 | 2539 | 6288 |
| 洞川 | city | Nara | Japan | 34.27 | 135.88 | 3723 | 1778 |
| 洞川院 | city | Yamagata | Japan | 38.75 | 140.72 | 830 | 2654 |