| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
| Ōgigaura | city | Tokyo-to | Japan | 27.0666667 | 142.2 | 364 | 12003 |
| Ōgimura | city | Tokyo-to | Japan | 27.0666667 | 142.2 | 364 | 12003 |
| Ōgiura | city | Tokyo-to | Japan | 27.0666667 | 142.2 | 364 | 12003 |
| Ōi-Kaiganchō | city | Tokyo-to | Japan | 35.5833333 | 139.7333333 | 9 | 591163 |
| Ōi-Kitahamagawachō | city | Tokyo-to | Japan | 35.6 | 139.75 | 0 | 500345 |
| Ōi-Minamihamagawachō | city | Tokyo-to | Japan | 35.6 | 139.7333333 | 26 | 705210 |
| Ōi-Suzugamorichō | city | Tokyo-to | Japan | 35.5833333 | 139.7333333 | 9 | 591163 |
| Ōji | city | Tokyo-to | Japan | 35.75 | 139.7166667 | 75 | 793984 |
| Ōji | city | Tokyo-to | Japan | 35.7666667 | 139.7333333 | 32 | 644167 |
| Ōjichō | city | Tokyo-to | Japan | 35.75 | 139.7166667 | 75 | 793984 |
| Ōjimachi | city | Tokyo-to | Japan | 35.75 | 139.7166667 | 75 | 793984 |
| Ōjimachi | city | Tokyo-to | Japan | 35.7666667 | 139.7333333 | 32 | 644167 |
| Ōkubo | city | Tokyo-to | Japan | 34.1166667 | 139.5166667 | 715 | 23465 |
| Ōkubo | city | Tokyo-to | Japan | 35.7 | 139.7 | 104 | 802746 |
| Ōkubo | city | Tokyo-to | Japan | 35.7 | 139.7166667 | 101 | 781610 |
| Ōmaki | city | Tokyo-to | Japan | 34.6833333 | 139.4166667 | 0 | 20214 |
| Ōme | city | Tokyo-to | Japan | 35.7838889 | 139.2430556 | 702 | 801906 |
| Ōmori | city | Tokyo-to | Japan | 35.5666667 | 139.7333333 | 13 | 591163 |
| Ōmorimachi | city | Tokyo-to | Japan | 35.5666667 | 139.7333333 | 13 | 591163 |
| Ōmura | city | Tokyo-to | Japan | 27.0833333 | 142.1833333 | 0 | 12003 |
| Ōtemachi | city | Tokyo-to | Japan | 35.6833333 | 139.7666667 | 13 | 733224 |
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