The best episode directed by Takeshi Ogasawara is "The Day All Tuna Vanished", rated 5/10 from 1 user votes. It was "written by Katsuhiko Taguchi". "The Day All Tuna Vanished" aired on 1/3/1988 and is rated 0.0 point(s) higher than their second highest rated, "Assault on a Haunted School".
Kotaro fights to stop the abduction of tuna by Professor Kuromatsu in order to gain an extract to improve the power of the Golgom mutants.
Director: Takeshi Ogasawara
Writer: Katsuhiko Taguchi
Keisuke tries to stop a Golgom scheme of using schools to mold children into model students to assist in their control of Earth.
Director: Takeshi Ogasawara
Writer: Junichi Miyashita
Director: Takeshi Ogasawara
Writer: Noboru Sugimura
Bishium uses a Mutant to infect Battle Hopper with insects that make it run wild and ignore Kotaro's commands.
Director: Takeshi Ogasawara
Writer: Noboru Sugimura
Kotaro must save Katsumi and other college girls from a professor turned Golgom Mutant hoping to add more females to the mutant army.
Director: Takeshi Ogasawara
Writer: Ryu Yamaguchi
Director: Takeshi Ogasawara
Writer: Katsuhiko Taguchi
Bilgenia uses a scarab beetle Mutant to create a craze for its minions, forcing Kotaro into a corner in trying to stem this greedy obsession.
Director: Takeshi Ogasawara
Writer: Naruhisa Arakawa
Kotaro must rescue four Japanese astronauts when they're abducted and replaced with doll-like clones controlled by a Golgom Mutant.
Director: Takeshi Ogasawara
Writer: Junichi Miyashita
Kotaro meets two brothers, Makoto and Yuki who has psychic powers which Yuki gets kidnap by Fly Mutant to bring the Phantom Mutants to life and begins a invasion of Tokyo. Kotaro tries to fight back and only to find the Phantom Monsters tuern themselves incorporeal to avoid his attacks! Will Kotaro find a way of how to end this madness, once and for all?
Director: Takeshi Ogasawara
Writer: Takashi Yamada
Kotaro investigates the claim of a child that something strange is happening at his apartment, leading to a discovery of its inhabitants being used to create new mutants for Golgom!
Director: Takeshi Ogasawara
Writer: Kenichi Araki