Showing 44 registered airlines with a combined fleet of 454 airframes.
| Airline Name | ICAO / IATA | Fleet Size |
|---|---|---|
| IKI International Airlines | IKK | 0 |
| ILAS Air | ILC | 0 |
| Iwamoto Crane Co Ltd | OIC | 0 |
| J-Air | JLJ / JL | 0 |
| JAL Express | JEX / JC | 0 |
| JALways | JAZ / JO | 0 |
| Japan Air Commuter | JAC | 1 |
| Japan Aircraft Service | JSV | 0 |
| Japan Airlines | JAL / JL | 133 |
| Japan Transocean Air | JTA / NU | 9 |