Young air delivery boy Naoki Tachibana (played by, oddly enough, Naoki Tachibana; His character's first name is spelled in katakana, however) is out to deliver a package for his grumpy boss Daisaku Banno (played by veteran actor Jun Tazaki), when his older brother Shin'ya (Toshiaki Amada), who commanded the defense force, Protective Attacking Team (PAT), was killed in an attack by a giant monster called King Jyglus (which was sent by the evil alien Antigone of the planet Groth).
He suddenly finds himself back in his cessna's cockpit in the real world, but he hears the Emerald Alien's voice, telling him to activate his wristwatch, and upon shouting the command "Jum-Fight!!!
", his jet transforms into the giant cyborg, Jumborg Ace, with Naoki, in a VR movement-control suit, piloting the robot from inside the head with his own physical movements!
But his battle against the Groth Aliens has only just begun... Jumborg Ace has a vast array powers, including a sword coming from his stomach, missiles, and energy beams.
Jumborg Ace was integrated into the "M78 Canon" in the form of "Jeanbot": A double-changing robot warrior who debuted in Ultraman Zero The Movie: Super Deciding Fight!
Jumborg Ace & Giant (ジャンボーグA&ジャイアント, Janbōgu Ēsu to Jaianto), known in Thailand as Giant and Jumbo A (ยักษ์วัดแจ้ง พบ จัมโบ้เอ - Yak Wat Jaeng phop Chambo E, or Yuk Wud Jaeng pob Jambo A, depending on the Romanization) is a tokusatsu science fiction/kaiju/superhero film produced in 1974 by Tsuburaya Productions of Japan and Chaiyo Productions of Thailand, directed by Sompote Sands.