| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Furumori, Gunma (古森) | 377-1306 |
| Postal/ZIP Codes in Haneo, Gunma (羽根尾) | 377-1307 |
| Postal/ZIP Codes in Hayashi, Gunma (林) | 377-1309 |
| Postal/ZIP Codes in Kawarahata, Gunma (川原畑) | 377-1301 |
| Postal/ZIP Codes in Kawarayu, Gunma (川原湯) | 377-1302 |
| Postal/ZIP Codes in Kitakaruizawa, Gunma (北軽井沢) | 377-1412 |
| Postal/ZIP Codes in Naganohara, Gunma (長野原) | 377-1304 |
| Postal/ZIP Codes in Okuwa, Gunma (応桑) | 377-1411, 377-1310 |
| Postal/ZIP Codes in Others, Gunma (その他) | 377-1300 |
| Postal/ZIP Codes in Otsu, Gunma (大津) | 377-1308 |
| Postal/ZIP Codes in Yokiya, Gunma (与喜屋) | 377-1305 |
| Postal/ZIP Codes in Yokokabe, Gunma (横壁) | 377-1303 |