The Area Codes of Japan:
| City/Town or Region | Area code | |
|---|---|---|
| 1. | Ōita | 97 (+81 97) |
| 2. | Okayama | 862 (+81 862) |
| 3. | Okayama | 869 (+81 869) |
| 4. | Okazaki | 564 (+81 564) |
| 5. | Osaka, Higashiōsaka, Suita, Toyonaka, Amagasaki | 6 (+81 6) |
| 6. | Ōtsu | 775 (+81 775) |
The Area Codes of Japan:
| City/Town or Region | Area code | |
|---|---|---|
| 1. | Ōita | 97 (+81 97) |
| 2. | Okayama | 862 (+81 862) |
| 3. | Okayama | 869 (+81 869) |
| 4. | Okazaki | 564 (+81 564) |
| 5. | Osaka, Higashiōsaka, Suita, Toyonaka, Amagasaki | 6 (+81 6) |
| 6. | Ōtsu | 775 (+81 775) |