Invasion of the Neptune Men

Astronomer Shinichi Tachibana has a secret identity as the superhero "Iron Sharp" and is well beloved by children. When they are attacked by a group of metallic aliens, Iron Sharp drives the aliens away. The resourceful Tachibana helps develop an electric barrier to block the aliens from coming to the Earth. After several losses by the aliens, they announce that they will invade the Earth, throwing the world into a state of panic.

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  Sonny Chiba

  Tachibana - Scientist / Space Chief
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  Shinjirō Ehara
• 
  Ryuko Mizukami

  Tanigawa Yoko
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  Mitsue Komiya
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  Seiichirō Kameishi
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  Rinichi Yamamoto
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  Takashi Kanda
• 
  Ken Sudo
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  Kōji Sekiyama
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  Gōzō Sōma