| Code | Name | Region |
|---|---|---|
| JPMGN | Mogine | 43 |
| JPMOJ | Moji/kitakyushu | 40 |
| JPMBE | Monbetsu/abashiri | 1 |
| JPMOX | Monoi | 32 |
| JPMOA | Mooka | 9 |
| JPMRK | Morakui | 32 |
| JPMOR | Mori | 1 |
| JPMRG | Moriage | 38 |
| JPMOO | Morie | 44 |
| JPQGT | Moriguchi | 27 |
| JPMRH | Morinohama | 42 |
| JPMRW | Morioka | 3 |
| JPMRY | Moriya | 8 |
| JPMYM | Moriyama, Shiga | 25 |
| JPMOM | Morodomi | 41 |
| JPMRZ | Morozaki | 23 |
| JPMBT | Motobu | 47 |
| JPMOT | Motomachi | 13 |
| JPMTO | Motoura/azuma | 46 |
| JPMMY | Miyakojima | 47 |
| JPYAK | Miyakonojo | 45 |
| JPQYM | Miyama, Fukuoka | 40 |
| JPMUY | Miyanoura, Kagawa | 37 |
| JPMNR | Miyanoura, Nagasaki | 42 |
| JPMYN | Miyanoura/azuma | 46 |
| JPMNO | Miyanoura/kamiyaku | 46 |
| JPMYU | Miyaura | 38 |
| JPMZK | Miyazaki, Ehime | 38 |
| JPKMI | Miyazaki, Miyazaki | 45 |
| JPMIY | Miyazu | 26 |
| JPMYS | Miyoshi | 34 |
| JPMYT | Miyoshi, Tokushima | 36 |
| JPMZH | Mizuho | 13 |
| JPSXR | Mizunami | 21 |
| JPMZS | Mizusaki | 42 |
| JPMIZ | Mizushima | 33 |
| JPMOB | Mobara | 12 |
| JPMCD | Mochidoi | 42 |
| JPMCH | Mochiishi | 32 |
| JPMTC | Mitachi | 37 |
| JPMJR | Mitajiri | 35 |
| JPMIT | Mitaka, Hiroshima | 34 |
| JPMTA | Mitaka, Tokyo | 13 |
| JPMTI | Mitarai | 34 |
| JPMI3 | Mito | 8 |
| JPMQT | Mito, Kagawa | 37 |
| JPOYO | Mitoyo, Kagawa | 37 |
| JPMKN | Mitsu Kanagawa | 33 |
| JPMTH | Mitsuhama | 38 |
| JPMSE | Mitsuke | 15 |