The Area Codes of Japan:
| City/Town or Region | Area code | |
|---|---|---|
| 1. | Kagoshima | 99 (+81 99) |
| 2. | Kakogawa | 794 (+81 794) |
| 3. | Kamogawa | 470 (+81 470) |
| 4. | Kanazawa | 762 (+81 762) |
| 5. | Kasai | 790 (+81 790) |
| 6. | Kashiwa | 471 (+81 471) |
| 7. | Kasugai | 568 (+81 568) |
| 8. | Kawagoe | 49 (+81 49) |
| 9. | Kawaguchi | 482 (+81 482) |
| 10. | Kawasaki | 44 (+81 44) |
| 11. | Kitakyushu | 93 (+81 93) |
| 12. | Kobe | 78 (+81 78) |
| 13. | Kochi | 888 (+81 888) |
| 14. | Kofu | 55 (+81 55) |
| 15. | Kōriyama | 249 (+81 249) |
| 16. | Kumamoto | 96 (+81 96) |
| 17. | Kurashiki | 864 (+81 864) |
| 18. | Kurashiki | 865 (+81 865) |
| 19. | Kurume | 942 (+81 942) |
| 20. | Kyoto | 75 (+81 75) |