| Locality | Post Code |
|---|---|
| Kikugawacho Mominoki (下関市) | 750-0303 |
| Kikugawacho Nanami (下関市) | 750-0315 |
| Kikugawacho Narazaki (下関市) | 750-0322 |
| Kikugawacho Nishinakayama (下関市) | 750-0301 |
| Kikugawacho Nisshin (下関市) | 750-0323 |
| Kikugawacho Shimohoki (下関市) | 750-0306 |
| Kikugawacho Shimokaeda (下関市) | 750-0317 |
| Kikugawacho Shimoono (下関市) | 750-0312 |
| Kikugawacho Tabe (下関市) | 750-0313 |
| Kikugawacho Yoshika (下関市) | 750-0316 |
| Kiyosue (下関市) | 750-1151 |
| Kiyosue Daimon (下関市) | 750-1164 |
| Kiyosue Gomo (下関市) | 750-1162 |
| Kiyosue Higashimachi (下関市) | 750-1156 |
| Kiyosue Hommachi (下関市) | 750-1154 |
| Kiyosue Jinya (下関市) | 750-1152 |
| Kiyosue Kurama (下関市) | 750-1153 |
| Kiyosue Nakamachi (下関市) | 750-1155 |