| Code | Name | Region |
|---|---|---|
| JPIIN | Nishinoomote | 46 |
| JPNHO | Nishio | 23 |
| JPNSH | Nishishioya | 46 |
| JPNTO | Nishitokyo | 13 |
| JPNUR | Nishiura | 22 |
| JPNWI | Nishiwaki | 28 |
| JPNSS | Nisshin | 23 |
| JPNIA | Nita | 42 |
| JPNOB | Nobeoka | 45 |
| JPNXG | Nigishima | 24 |
| JPNQU | Nihonmatsu | 7 |
| JPNIX | Nii | 42 |
| JPKIJ | Niigata | 15 |
| JPNIH | Niigatahigashi | 15 |
| JPNIN | Niigatanishi | 15 |
| JPIHA | Niihama | 38 |
| JPNIJ | Niijima | 13 |
| JPXCA | Niikappu | 1 |
| JPNMZ | Niimi | 33 |
| JPNIK | Nikaho | 5 |
| JPNKI | Niki | 1 |
| JPUYT | Nikko | 9 |
| JPNIM | Nima | 32 |
| JPNNE | Ninohe | 3 |
| JPNMY | Ninomiya | 14 |
| JPNIO | Nio | 37 |
| JPNZW | Niseko, Hokkaido | 1 |
| JPNID | Nishi/kitadaito | 47 |
| JPNDI | Nishi/minamidaito | 47 |
| JPQNZ | Nara City | 29 |
| JPNRO | Narao | 42 |
| JPNAI | Narashino | 12 |
| JPNRT | Narita Apt/tokyo | 12 |
| JPNRI | Narita, Chiba | 12 |
| JPNRS | Narushima | 42 |
| JPNRU | Naruto | 36 |
| JPNSX | Nasa | 36 |
| JPNMS | Nasu Machi | 9 |
| JPNKA | Nasukarasuyama | 9 |
| JPNSC | Nasushiobara | 9 |
| JPNAZ | Naze | 46 |
| JPNGI | Neghishi/yokohama | 14 |
| JPNEJ | Nejime | 46 |
| JPNEM | Nemuro | 1 |
| JPNNK | Nenokuchi | 2 |
| JPNEO | Neo | 42 |
| JPNYW | Neyagawa | 27 |
| JPNEZ | Nezugaseki | 6 |
| JPNIC | Nichinan | 45 |
| JPSHB | Nakashibetsu | 1 |