| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
| Iya | city | Shimane-ken | Japan | 35.4333333 | 133.15 | 22 | 13699 |
| Iyama | city | Nagano-ken | Japan | 36.85 | 138.3666667 | 1030 | 19507 |
| Iyawato | city | Miyazaki-ken | Japan | 32.4833333 | 131.25 | 1692 | 19080 |
| Iyo | city | Ehime-ken | Japan | 33.7513889 | 132.7013889 | 127 | 15016 |
| Iyoda | city | Yamaguchi-ken | Japan | 33.9333333 | 132.4333333 | 3 | 4624 |
| Iyogawa | city | Tokushima-ken | Japan | 33.95 | 133.75 | 1312 | 24945 |
| Iyota | city | Yamaguchi-ken | Japan | 33.9333333 | 132.4333333 | 3 | 4624 |
| Iyu | city | Okinawa-ken | Japan | 26.6255556 | 128.2075 | 0 | 36682 |
| Iyudomari | city | Okinawa-ken | Japan | 26.6166667 | 128.2166667 | 0 | 11103 |
| Iyutomari | city | Okinawa-ken | Japan | 26.6166667 | 128.2166667 | 0 | 11103 |
| Iyū | city | Okinawa-ken | Japan | 26.6255556 | 128.2075 | 0 | 36682 |
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