| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Hotchi, Nagano (発地) | 389-0113 |
| Postal/ZIP Codes in Karuizawa, Nagano (軽井沢) | 389-0103, 389-0102 |
| Postal/ZIP Codes in Karuizawahigashi, Nagano (軽井沢東) | 389-0104 |
| Postal/ZIP Codes in Mozawa, Nagano (茂沢) | 389-0114 |
| Postal/ZIP Codes in Nagakura, Nagano (長倉) | 389-0111 |
| Postal/ZIP Codes in Nakakaruizawa, Nagano (中軽井沢) | 389-0112 |
| Postal/ZIP Codes in Oiwake, Nagano (追分) | 389-0115 |
| Postal/ZIP Codes in Others, Nagano (その他) | 389-0100 |
| Postal/ZIP Codes in Togemachi, Nagano (峠町) | 389-0101 |
| Postal Codes in Kitasaku | |
|---|---|
| Postal/ZIP Codes in Karuizawa (軽井沢町) | |
| Postal/ZIP Codes in Miyota (御代田町) | |
| Postal/ZIP Codes in Tateshina (立科町) | |