| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| 一反田 | city | Iwate | Japan | 39.36 | 141.21 | 830 | 18424 |
| 一戸 | city | Iwate | Japan | 40.22 | 141.29 | 830 | 15899 |
| 一戸町 | city | Iwate | Japan | 40.22 | 141.29 | 830 | 15899 |
| 一日市 | city | Iwate | Japan | 39.39 | 141.12 | 259 | 33275 |
| 一本木 | city | Iwate | Japan | 38.79 | 141.22 | 262 | 13556 |
| 一本木 | city | Iwate | Japan | 40.17 | 141.37 | 1669 | 4686 |
| 一本杉 | city | Iwate | Japan | 39.41 | 141.09 | 351 | 32004 |
| 一本杉 | city | Iwate | Japan | 39.39 | 141.06 | 367 | 26845 |