| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
| Kado | city | Iwate-ken | Japan | 39.8666667 | 141.65 | 1564 | 10703 |
| Kadonohama | city | Iwate-ken | Japan | 38.9833333 | 141.7333333 | 0 | 4019 |
| Kaegura | city | Iwate-ken | Japan | 39.35 | 141.3166667 | 620 | 10778 |
| Kaizawa | city | Iwate-ken | Japan | 39.55 | 140.85 | 1528 | 10771 |
| Kakenoshita | city | Iwate-ken | Japan | 39.3 | 140.9666667 | 524 | 10787 |
| Kakkonda | city | Iwate-ken | Japan | 39.7166667 | 140.95 | 711 | 10722 |
| Kamaischi | city | Iwate-ken | Japan | 39.2666667 | 141.8833333 | 249 | 8094 |
| Kamaishi | city | Iwate-ken | Japan | 39.2666667 | 141.8833333 | 249 | 8094 |
| Kambayashi | city | Iwate-ken | Japan | 39.6183333 | 141.9666667 | 0 | 8602 |
| Kami Yahagi | city | Iwate-ken | Japan | 39.0333333 | 141.5333333 | 328 | 15950 |
| Kami-tsuyakawa | city | Iwate-ken | Japan | 38.85 | 141.4333333 | 961 | 18326 |
| Kami-ugei | city | Iwate-ken | Japan | 39.7666667 | 141.8 | 1738 | 10717 |
| Kamiakedo | city | Iwate-ken | Japan | 40.3 | 141.6333333 | 698 | 10635 |
| Kamiyanagi | city | Iwate-ken | Japan | 39.4166667 | 141.5333333 | 1040 | 10770 |
| Kanauchi | city | Iwate-ken | Japan | 39.65 | 141.6 | 1443 | 10736 |
| Kanazawa | city | Iwate-ken | Japan | 38.85 | 141.1666667 | 127 | 12826 |
| Kanegasaki | city | Iwate-ken | Japan | 39.2 | 141.1166667 | 219 | 10806 |
| Kanehama | city | Iwate-ken | Japan | 39.5833333 | 141.955 | 557 | 10496 |
| Kanezawa | city | Iwate-ken | Japan | 39.4333333 | 141.8166667 | 465 | 10770 |
| Kannombayashi | city | Iwate-ken | Japan | 40.3213889 | 141.3761111 | 882 | 11730 |
| Kannonbayashi | city | Iwate-ken | Japan | 40.3213889 | 141.3761111 | 882 | 11730 |
| Kannoshita | city | Iwate-ken | Japan | 39.3 | 140.9666667 | 524 | 10787 |
| Kariya | city | Iwate-ken | Japan | 39.65 | 141.75 | 567 | 10736 |
| Karumai | city | Iwate-ken | Japan | 40.3213889 | 141.4583333 | 613 | 11155 |
| Katasu | city | Iwate-ken | Japan | 39.6 | 141.65 | 908 | 10745 |
| Kawafune | city | Iwate-ken | Japan | 39.4833333 | 140.8 | 1167 | 10764 |
| Kawagishi | city | Iwate-ken | Japan | 39.2833333 | 141.1333333 | 314 | 10792 |
| Kawaguchi | city | Iwate-ken | Japan | 39.9166667 | 141.2 | 849 | 10689 |
| Kawaguchi | city | Iwate-ken | Japan | 39.15 | 141.5333333 | 761 | 10815 |
| Kawai | city | Iwate-ken | Japan | 39.6 | 141.6833333 | 1174 | 10745 |
| Kawajiri | city | Iwate-ken | Japan | 39.3166667 | 140.7833333 | 780 | 10850 |
| Kawajiri | city | Iwate-ken | Japan | 40.4166667 | 141.7 | 131 | 6987 |
| Kawakishi | city | Iwate-ken | Japan | 39.2833333 | 141.1333333 | 314 | 10792 |
| Kawakuchi | city | Iwate-ken | Japan | 39.15 | 141.5333333 | 761 | 10815 |
| Kawashiri | city | Iwate-ken | Japan | 39.3166667 | 140.7833333 | 780 | 10850 |
| Kawashiri | city | Iwate-ken | Japan | 40.4166667 | 141.7 | 131 | 6987 |
| Kawashiro | city | Iwate-ken | Japan | 39.4883333 | 142.0166667 | 0 | 6155 |
| Kawauchi | city | Iwate-ken | Japan | 39.65 | 141.6 | 1443 | 10736 |
| Kayokura | city | Iwate-ken | Japan | 39.35 | 141.3166667 | 620 | 10778 |
| Kazawa | city | Iwate-ken | Japan | 38.85 | 141.1666667 | 127 | 12826 |
| Kindaichi | city | Iwate-ken | Japan | 40.3166667 | 141.3 | 387 | 11731 |
| Kitakami | city | Iwate-ken | Japan | 39.2833333 | 141.1166667 | 200 | 10792 |
| Kitamata | city | Iwate-ken | Japan | 39.05 | 141.0333333 | 328 | 10829 |
| Ko Karumai | city | Iwate-ken | Japan | 40.2930556 | 141.525 | 725 | 11415 |
| Koashiro | city | Iwate-ken | Japan | 39.05 | 141.0333333 | 328 | 10829 |
| Kochi | city | Iwate-ken | Japan | 39.4833333 | 141.15 | 285 | 10764 |
| Kogarumai | city | Iwate-ken | Japan | 40.2930556 | 141.525 | 725 | 11415 |
| Kogayo | city | Iwate-ken | Japan | 39.1666667 | 141.3666667 | 1863 | 10806 |
| Kogayō | city | Iwate-ken | Japan | 39.1666667 | 141.3666667 | 1863 | 10806 |
| Koinooka | city | Iwate-ken | Japan | 38.9541667 | 140.9344444 | 859 | 17503 |
| Koishihama | city | Iwate-ken | Japan | 39.0833333 | 141.8333333 | 0 | 6861 |
| Kojirahama | city | Iwate-ken | Japan | 39.2166667 | 141.8666667 | 328 | 10221 |
| Kokayo | city | Iwate-ken | Japan | 39.1666667 | 141.3666667 | 1863 | 10806 |
| Kokkyo | city | Iwate-ken | Japan | 39.9166667 | 141.5833333 | 1633 | 10689 |
| Koma | city | Iwate-ken | Japan | 39.8833333 | 141.1833333 | 646 | 10694 |
| Komagamine | city | Iwate-ken | Japan | 40.15 | 141.1166667 | 984 | 10661 |
| Komoribayashi | city | Iwate-ken | Japan | 39.45 | 141.1333333 | 291 | 10770 |
| Komorihayashi | city | Iwate-ken | Japan | 39.45 | 141.1333333 | 291 | 10770 |
| Komoto | city | Iwate-ken | Japan | 39.85 | 141.9666667 | 223 | 5198 |
| Koriyama | city | Iwate-ken | Japan | 39.55 | 141.1666667 | 311 | 10750 |
| Kotsunagi | city | Iwate-ken | Japan | 40.1166667 | 141.2666667 | 1450 | 10666 |
| Kowashiro | city | Iwate-ken | Japan | 39.05 | 141.0333333 | 328 | 10829 |
| Kozawa | city | Iwate-ken | Japan | 39.4333333 | 141.8166667 | 465 | 10770 |
| Kozenji | city | Iwate-ken | Japan | 38.9333333 | 141.1666667 | 226 | 10860 |
| Kudschi | city | Iwate-ken | Japan | 40.1877778 | 141.7688889 | 32 | 9989 |
| Kuji | city | Iwate-ken | Japan | 40.1877778 | 141.7688889 | 32 | 9989 |
| Kurentsubo | city | Iwate-ken | Japan | 39.0833333 | 141.5833333 | 413 | 10826 |
| Kuretsubo | city | Iwate-ken | Japan | 39.0833333 | 141.5833333 | 413 | 10826 |
| Kuritsubo | city | Iwate-ken | Japan | 39.0833333 | 141.5833333 | 413 | 10826 |
| Kuriyama | city | Iwate-ken | Japan | 39.9833333 | 141.5 | 1640 | 10683 |
| Kurosaki | city | Iwate-ken | Japan | 40 | 141.9333333 | 426 | 5656 |
| Kurosawajiri | city | Iwate-ken | Japan | 39.2833333 | 141.1166667 | 200 | 10792 |
| Kurosawaziri | city | Iwate-ken | Japan | 39.2833333 | 141.1166667 | 200 | 10792 |
| Kurumihata | city | Iwate-ken | Japan | 39.7833333 | 141.9666667 | 498 | 6859 |
| Kusakai | city | Iwate-ken | Japan | 39.9166667 | 141.5833333 | 1633 | 10689 |
| Kutsukake | city | Iwate-ken | Japan | 39.2666667 | 141.6833333 | 2883 | 10792 |
| Kuwagasaki | city | Iwate-ken | Japan | 39.65 | 141.9666667 | 6 | 7067 |
| Kuwagasakicho | city | Iwate-ken | Japan | 39.65 | 141.9666667 | 6 | 7067 |
| Kuwagasakichō | city | Iwate-ken | Japan | 39.65 | 141.9666667 | 6 | 7067 |
| Kuzakai | city | Iwate-ken | Japan | 39.9166667 | 141.5833333 | 1633 | 10689 |
| Kuzi | city | Iwate-ken | Japan | 40.1877778 | 141.7688889 | 32 | 9989 |
| Kuzumaki | city | Iwate-ken | Japan | 40.0333333 | 141.4333333 | 1640 | 10679 |
| Kuzuneta | city | Iwate-ken | Japan | 39.7166667 | 140.95 | 711 | 10722 |
| Kōchi | city | Iwate-ken | Japan | 39.4833333 | 141.15 | 285 | 10764 |
| Kōma | city | Iwate-ken | Japan | 39.8833333 | 141.1833333 | 646 | 10694 |
| Kōriyama | city | Iwate-ken | Japan | 39.55 | 141.1666667 | 311 | 10750 |
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