Main Cast:
* Takumi Tsuda as Akira "Ace" Shiba (Red Denjiman): The leader of the Denjiman team, known for his leadership and fighting skills.
* Yutaka Fuji as Daigo "Big" Ooyama (Blue Denjiman): The strongman of the group, known for his strength and loyalty.
* Keiko Takeda as Kaori "Bell" Yamanouchi (Yellow Denjiman): The intelligent and resourceful member of the team.
* Masao Kusakari as Shingo "Thunder" Aoshima (Green Denjiman): The team's technician and strategist.
* Kazuo Niibori as Ken "Jet" Hasegawa (Black Denjiman): The skilled pilot and agile fighter.
Supporting Cast:
* Masao Kusakari also played Dr. Jun Aoshima (Shingo's father), the scientist who created the Denjiman.
* Sumiko Sakamoto as Akiko Ooyama (Daigo's sister)
* Michiko Hoshi as Michiko Shiba (Akira's mother)
* Shinya Nishijima as Shinya Shiba (Akira's younger brother)
* Hidetoshi Nishijima as Hidetoshi Shiba (Akira's father)
Notable Guest Stars:
* Kenji Matsuda as Dr. Kenzō "Kenzou" Daimon (The series' main villain)
* Shiro Sano as Professor Daisuke "Professor" Hoshi (Dr. Daimon's henchman)
It's important to note that some actors may have had minor roles or played multiple characters throughout the series.