| Code | Name | Region |
|---|---|---|
| JPKSY | Kasasa, Yamaguchi | 35 |
| JPKAC | Kasaura | 32 |
| JPKDJ | Kasedo | 46 |
| JPKAS | Kashihara, Nara | 29 |
| JPKKZ | Kashikojima | 24 |
| JPKSM | Kashima, Ibaraki | 8 |
| JPKSC | Kashima, Saga | 41 |
| JPKAE | Kashimae | 42 |
| JPKAO | Kashino | 33 |
| JPKMC | Kashiwa, Chiba | 12 |
| JPKSW | Kashiwa, Ehime | 38 |
| JPKHA | Kashiwara | 27 |
| JPKWZ | Kashiwazaki | 15 |
| JPKGI | Kasugai | 23 |
| JPKAK | Kasukabe | 11 |
| JPKXS | Kasumi | 28 |
| JPKAU | Kasumigaura | 8 |
| JPASU | Kasuya | 40 |
| JPKTZ | Kata | 24 |
| JPKNM | Kanmon | 40 |
| JPKJN | Kannonji | 37 |
| JPKRA | Kannoura | 39 |
| JPKKW | Kanokawa | 34 |
| JPKYA | Kanoya | 46 |
| JPKIX | Kansai Int Apt | 27 |
| JPKTC | Kanuma | 9 |
| JPKRK | Karakizaki | 43 |
| JPKKA | Karakuma | 46 |
| JPKTM | Karatomari | 40 |
| JPKAR | Karatsu | 41 |
| JPIKF | Kariya, Aichi | 23 |
| JPKRY | Kariya, Saga | 41 |
| JPKRB | Karubi | 32 |
| JPWUZ | Karuizawa, Nagano | 20 |
| JPKAN | Karuno | 8 |
| JPKSD | Kasado | 35 |
| JPSKJ | Kasai | 28 |
| JPCXZ | Kasama | 8 |
| JPKSA | Kasaoka | 33 |
| JPKAH | Kamihira | 43 |
| JPQIK | Kamiita, Tokushima | 36 |
| JPKKT | Kamikatetsu | 46 |
| JPZKK | Kamikatsu, Tokushima | 36 |
| JPKMW | Kamikawaguchi | 39 |
| JPKMM | Kaminato | 13 |
| JPKMF | Kaminofuruta | 46 |
| JPKMK | Kaminokae | 39 |
| JPKOX | Kaminoseki | 35 |
| JPKIU | Kamisu, Ibaraki | 8 |
| JPKSG | Kamisunagawa | 1 |