| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Komatsu, Wakayama (小松) | 647-1605 |
| Postal/ZIP Codes in Nanairo, Wakayama (七色) | 647-1601 |
| Postal/ZIP Codes in Onuma, Wakayama (大沼) | 647-1603 |
| Postal/ZIP Codes in Others, Wakayama (その他) | 647-1600 |
| Postal/ZIP Codes in Shimoi, Wakayama (下尾井) | 647-1604 |
| Postal/ZIP Codes in Takehara, Wakayama (竹原) | 647-1602 |