| Code | Name | Region |
|---|---|---|
| JPAAM | Ama, Shimane | 32 |
| JPAMA | Amagasaki | 28 |
| JPAMX | Amagasakinishinomiyaashiya | 28 |
| JPAMJ | Amaji | 39 |
| JPASJ | Amamioshima | 46 |
| JPAMS | Amasaki | 38 |
| JPAMT | Amatsuke | 43 |
| JPAMY | Amiya | 32 |
| JPAMU | Amura | 43 |
| JPAHF | Aizubange, Fukushima | 7 |
| JPZIS | Aizumisato, Fukushima | 7 |
| JPAKU | Aizuwakamatsu | |
| JPAJX | Aja | 47 |
| JPAJI | Aji | 37 |
| JPAJK | Ajigasawa | 2 |
| JPAJN | Ajino | 33 |
| JPAZR | Ajiro, Okayama | 33 |
| JPAJR | Ajiro, Shizuoka | 22 |
| JPAZJ | Ajiro, Tottori | 31 |
| JPACH | Ajisu | 35 |
| JPAKD | Akadomari | 15 |
| JPAKX | Akaiwa | 33 |
| JPAKG | Akakina | 46 |
| JPAKM | Akamizu | 46 |
| JPAKK | Akasaki, Kumamoto | 43 |
| JPASK | Akasaki, Tottori | 31 |
| JPAKA | Akashi | 28 |
| JPAKH | Akehama | 38 |
| JPKFK | Aki, Kochi | 39 |
| JPAG2 | Agano | 15 |
| JPAGN | Agenosho | 35 |
| JPAGO | Ageo | 11 |
| JPAGE | Ageo-shi, Saitama | 11 |
| JPAGS | Ageshima | 37 |
| JPAGR | Agonoura | 47 |
| JPAGC | Agui Aichi | 23 |
| JPAGJ | Aguni | 47 |
| JPAKZ | Aika | 32 |
| JPAKI | Aikakita | 32 |
| JPAIW | Aikawa, Nagasaki | 42 |
| JPAIK | Aikawa, Niigata | 15 |
| JPAIN | Ainoura/sasebo | 42 |
| JPAIA | Ainouraaoki/naru | 42 |
| JPAII | Aio | 35 |
| JPAIO | Aioi | 28 |
| JPAIR | Aira | 46 |
| JPAIS | Aisai | 23 |
| JPAIM | Aishima | 35 |
| JPAIZ | Aizu, Kumamoto | 43 |
| JP |