| Code | Name | Region |
|---|---|---|
| JPSAB | Saba | 38 |
| JPSBE | Sabae Fukui | 18 |
| JPSDO | Sado | 15 |
| JPSOS | Sado Shima Apt | 15 |
| JPHSG | Saga | |
| JPSGA | Saga, Kochi | 39 |
| JPQSG | Saga, Saga | 41 |
| JPGGE | Sagae | 6 |
| JPSGH | Sagamihara | 14 |
| JPSAG | Saganoseki | 44 |
| JPSGR | Sagara | 22 |
| JPSAW | Sagawa | 38 |
| JPSGJ | Sagi | 34 |
| JPSJA | Sai, Aomori | 2 |
| JPSAC | Sai, Shimane | 32 |
| JPSDZ | Saidaiji | 33 |
| JPSAD | Saidoh | 46 |
| JPSGU | Saigo, Nagasaki | 42 |
| JPSAI | Saigo, Shimane | 32 |
| JPOWA | Owase | 24 |
| JPOYB | Oyabu | 33 |
| JPOAM | Oyama | 9 |
| JPOAY | Oyama, Shizuoka | 22 |
| JPOZX | Ozaki | 27 |
| JPOOO | Ozu | 34 |
| JPZZO | Ozu, Kumamoto | 43 |
| JPOZU | Ozuku | 32 |
| JPRAU | Rausu | 1 |
| JPRBJ | Rebun | 1 |
| JPRHK | Reihoku | 43 |
| JPRIS | Rishiri | 1 |
| JPRIT | Ritto | 25 |
| JPRKO | Rokko Island | 28 |
| JPRND | Ronden | 32 |
| JPRMI | Rumoi | 1 |
| JPRYS | Ryohshida | 34 |
| JPRYO | Ryotsu | 15 |
| JPRYG | Ryugamizu | 46 |
| JPRYU | Ryugasaki | 8 |
| JPOTK | Otake | 34 |
| JPZAD | Ota-ku | 13 |
| JPOTA | Otao | 42 |
| JPOTR | Otaru | 1 |
| JPOTW | Otawa | 42 |
| JPZAQ | Otawara | 9 |
| JPOTM | Otomi | 18 |
| JPQOO | Otsu City | 25 |
| JPOSJ | Otsu, Ibaraki | 8 |
| JPOTU | Otsu, Shiga | 25 |
| JPOTJ | Otsuchi | 3 |