| Locality | Post Code |
|---|---|
| Hikoshima Amanogocho (下関市) | 750-0071 |
| Hikoshima Deshimatsucho (下関市) | 750-0076 |
| Hikoshima Deshimatsuhigashimachi (下関市) | 750-0077 |
| Hikoshima Enoracho (下関市) | 750-0075 |
| Hikoshima Fukuracho (下関市) | 750-0087 |
| Hikoshima Hommuracho (下関市) | 750-0074 |
| Hikoshima Midoricho (下関市) | 750-0091 |
| Hikoshima Mukaicho (下関市) | 750-0084 |
| Hikoshima Nishiyamacho (下関市) | 750-0093 |
| Hikoshima Oimachi (下関市) | 750-0072 |
| Hikoshima Oinoyamakoen (下関市) | 750-0073 |
| Hikoshima Sakomachi (下関市) | 750-0092 |
| Hikoshima Sakuragaokacho (下関市) | 750-0083 |
| Hikoshima Shiohamacho (下関市) | 750-0086 |
| Hikoshima Sugitacho (下関市) | 750-0078 |
| Hikoshima Sumakuracho (下関市) | 750-0081 |
| Hikoshima Takenokojimacho (下関市) | 750-0094 |
| Hikoshima Tanokubicho (下関市) | 750-0085 |
| Hikoshima Yamanakacho (下関市) | 750-0082 |
| Hohokucho Agawa (下関市) | 759-5241 |
| Hohokucho Awano (下関市) | 759-5101 |
| Hohokucho Kanda (下関市) | 759-5331 |
| Hohokucho Kandakami (下関市) | 759-5513, 759-6121 |
| Hohokucho Kitauka (下関市) | 759-5513 |
| Hohokucho Takibe (下関市) | 759-5511 |
| Hohokucho Tasuki (下関市) | 759-5512 |