J4/Neo Jetman 4 is the codename of an unnamed member of the Neo-Jetman. He makes his first appearance saving the Jetman from Meteor BEM before it could finish them off. After Supreme Commander Akira Ichijou disbands the original Jetman, J4 and the other Neo-Jetmen aggressively threw them out of SkyCamp. When Meteor BEM infiltrates and begins to destroy SkyCamp, J4 and his teammates are overpowered, and were forced to take a last stand when Ichijou locks them and Aya in the same room. When the original Jetman join the fight, J4 and his team sacrifice their powers to give them their powers back, ultimately making peace with them and admitting they are the true Jetman.
Neither J4 or his team participated in the Great Legend War, as they are canonically depowered.
Choujin Sentai Jetman: Toki wo Kakete
In the non-canon manga sequel, J4 and the other Neo-Jetman somehow have their powers back and have taken over for the original Jetman, who have retired. When Radiguet possesses Tranza and attacks the city, the Neo-Jetman are taken hostage in the Jet Garuda. After being saved by the Jetmen, the Neo-Jetmen make way for them once again. At the end of the series, all of SkyCamp, the Neo-Jetman included, go out to enjoy the sky together, promising to fight for the Earth.
The Neo-Jetmen wear a black militarized Sentai outfit with wrist and shoulder armor, and their Birdonic Reactors fitted on their chest. They wear a silver buckle with a holster for their Neo Shooter. Their helmets are bird themed, being silver and black with a white visor with the Jetman symbol on the forehead, and two large black see-through eye spots. Neither their suits nor their helmets fully cover their bodies; they suit leaves their neck exposed and the helmet leaves their mouths and part of their cheeks exposed.
- Jet Swallow
- Neo Slicer
- Neo Shooter
- Neo Mines
- J4 is the only male Sentai Ranger to take over for and pilot a female Sentai Ranger's mecha as his own, taking Ako Hayasaka's Jet Swallow when he replaced her.
- J4's actor, Takeshi Miyazaki, as well as Ryuji Kasahara, Minoru Watanabe and Miyuki Nagato, who played fellow Neo-Jetman J2, J3 and J5, are suit actors to play as a Sentai Ranger's character outside of playing them in-costume. The only non suit-actor who play a Neo-Jetman is Yūta Mochizuki, who plays J1 as he would go on to play Geki in the next series.