| Place | Postal Code |
|---|---|
| 祝島 (Iwaishima, Yamaguchi) | 742-1401 |
| 室津 (Murotsu, Yamaguchi) | 742-1403 |
| 長島 (Nagashima, Yamaguchi) | 742-1402 |
| その他 (Others, Yamaguchi) | 742-1400 |
| 八島 (Yashima, Yamaguchi) | 742-1404 |
| Postal Codes in Kumage | |
|---|---|
| Hirao (平生町) | |
| Kaminoseki (上関町) | |
| Tabuse (田布施町) | |