List of All Postal Codes in Kosaka | ||
|---|---|---|
| Postal Code Code | Postal Code Name | Prefecture |
| 017-0200 | Ikanikeisaiganaibaai | Akita Prefecture |
| 017-0201 | Kosaka | Akita Prefecture |
| 017-0202 | Kosakakozan | Akita Prefecture |
| 017-0203 | Uwamuki | Akita Prefecture |
| 017-0204 | Araya | Akita Prefecture |
| 017-0205 | Daichi | Akita Prefecture |
| 018-5511 | Towadako | Akita Prefecture |