| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Ōya | city | Nagasaki-ken | Japan | 32.6166667 | 130.2 | 167 | 17703 |
| Ōya | city | Nagano-ken | Japan | 36.3666667 | 138.3 | 1696 | 19538 |
| Ōya | city | Gumma-ken | Japan | 36.1666667 | 138.9333333 | 2194 | 38134 |
| Ōya | city | Yamagata-ken | Japan | 38.3397222 | 140.1594444 | 656 | 15874 |
| Ōya | city | Miyagi-ken | Japan | 38.8166667 | 141.5666667 | 16 | 20462 |
| Ōya-ichiba | city | Hyogo-ken | Japan | 35.3333333 | 134.6666667 | 656 | 79100 |
| Ōyabu | city | Kagawa-ken | Japan | 34.3333333 | 133.9 | 232 | 59796 |
| Ōyachi | city | Yamagata-ken | Japan | 38.8369444 | 140.2069444 | 446 | 15765 |
| Ōyaji | city | Akita-ken | Japan | 40.0666667 | 139.9666667 | 3 | 9186 |
| Ōyama | city | Shizuoka-ken | Japan | 34.6 | 138.2166667 | 0 | 9757 |
| Ōyama | city | Yamagata-ken | Japan | 38.75 | 139.7666667 | 111 | 14708 |
| Ōyamato | city | Nara-ken | Japan | 34.5666667 | 135.8333333 | 236 | 48031 |
| Ōyanagi | city | Akita-ken | Japan | 39.0833333 | 140.7166667 | 1312 | 12096 |
| Ōyanagi | city | Miyagi-ken | Japan | 38.5 | 141.1166667 | 36 | 37546 |
| Ōyauchi | city | Fukushima-ken | Japan | 37.2 | 140.9833333 | 164 | 14364 |
| Ōyo | city | Nagasaki-ken | Japan | 32.6166667 | 130.2 | 167 | 17703 |
| Ōyodo | city | Mie-ken | Japan | 34.55 | 136.65 | 36 | 25786 |
| Ōyu | city | Akita-ken | Japan | 40.2880556 | 140.8255556 | 656 | 11982 |
| Ōyō | city | Kochi-ken | Japan | 33.1 | 132.95 | 518 | 14287 |
| Ōyū | city | Kochi-ken | Japan | 33.1 | 132.95 | 518 | 14287 |
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