| 10 call area | prefix | ||
|---|---|---|---|
| 1 | Kanto | 関東 | JA1-JS1, 7J1, 8J1-8N1, 7K1-7N4 (all of 7K,7L,7M,7N series are Kanto area) |
| 2 | Tokai | 東海 | JA2-JS2, 7J2, 8J2-8N2 |
| 3 | Kinki | 近畿 | JA3-JS3, 7J3, 8J3-8N3 |
| 4 | Chugoku | 中国 | JA4-JS4, 7J4, 8J4-8N4 |
| 5 | Shikoku | 四国 | JA5-JS5, 7J5, 8J5-8N5 |
| 6 | Kyushu and Okinawa | 九州・沖縄 | JA6-JS6, 7J6, 8J6-8N6 |
| 7 | Tohoku | 東北 | JA7-JS7, 7J7, 8J7-8N7 |
| 8 | Hokkaido | 北海道 | JA8-JS8, 7J8, 8J8-8N8 |
| 9 | Hokuriku | 北陸 | JA9-JS9, 7J9, 8J9-8N9 |
| 0 | Shin'etsu | 信越 | JA0-JS0, 7J0, 8J0-8N0 |