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List of postal codes
| Place | Postal code |
|---|---|
| Araicho Arai | 431-0302 |
| Araicho Hamana | 431-0303 |
| Araicho Nakanogo | 431-0301 |
| Araicho Uchiyama | 431-0304 |
| Boze | 431-0444 |
| Ekiminami | 431-0427 |
| Ikanikeisaiganaibaai | 431-0400 |
| Iride | 431-0411 |
| Kanza | 431-0405 |
| Kazenomori | 431-0432 |
| Kibi | 431-0492, 431-0441 |
| Komi | 431-0442 |
| Minamidai | 431-0429 |
| Ochiba | 431-0403 |
| Okasaki | 431-0422 |
| Ota | 431-0404 |
| Riki | 431-0402 |
| Sakaijuku | 431-0452, 431-0496 |
| Shinjo | 431-0421 |
| Shinjo.okasaki.umedanyukaichi | 431-0423 |
| Shinjohara | 431-0424 |
| Shinjohara Higashi | 431-0426 |
| Shirasuka | 431-0451 |
| Tokiwa | 431-0428 |
| Uchiura | 431-0412 |
| Umeda | 431-0425, 431-0493 |
| Washizu | 431-0431, 431-0494, 431-0495 |
| Yamaguchi | 431-0443 |
| Yokoyama | 431-0401 |
| ƹȥ¿Å¸Ãưű Æ¯Æ | 431-0395 |
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Each region in Kosai Shi has its own unique postal code, and it’s important to have the correct code to ensure timely delivery of your mail. To find the correct code for your destination region, simply click on the region in the list above. If you’re unsure which region to choose, try our address lookup tool at the top of the page or use our interactive map to find your zip code.