| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
| Ichigaya | city | Tokyo-to | Japan | 35.7 | 139.7333333 | 65 | 781610 |
| Igaya | city | Tokyo-to | Japan | 34.1 | 139.5 | 1112 | 23465 |
| Imado | city | Tokyo-to | Japan | 35.7166667 | 139.8 | 3 | 798921 |
| Ina | city | Tokyo-to | Japan | 35.7166667 | 139.25 | 793 | 802326 |
| Irifunecho | city | Tokyo-to | Japan | 35.6666667 | 139.7833333 | 3 | 733224 |
| Irifunechō | city | Tokyo-to | Japan | 35.6666667 | 139.7833333 | 3 | 733224 |
| Ishijimacho | city | Tokyo-to | Japan | 35.6833333 | 139.8166667 | 3 | 696022 |
| Ishijimachō | city | Tokyo-to | Japan | 35.6833333 | 139.8166667 | 3 | 696022 |
| Ishino | city | Tokyo-to | Japan | 25.45 | 141.3 | 0 | 2301 |
| Ishinomura | city | Tokyo-to | Japan | 25.45 | 141.3 | 0 | 2301 |
| Itabashicho | city | Tokyo-to | Japan | 35.75 | 139.7166667 | 75 | 793984 |
| Itabashichō | city | Tokyo-to | Japan | 35.75 | 139.7166667 | 75 | 793984 |
| Itabashimachi | city | Tokyo-to | Japan | 35.75 | 139.7166667 | 75 | 793984 |
| Itsukaichi | city | Tokyo-to | Japan | 35.7252778 | 139.2177778 | 656 | 802326 |
| Iwai | city | Tokyo-to | Japan | 35.75 | 139.2333333 | 859 | 802326 |
| Izumi | city | Tokyo-to | Japan | 35.6333333 | 139.5833333 | 65 | 689939 |
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