Watch Invasion of the Neptune Men (1961): stream Invasion of the Neptune Men (1961) on Apple TV+, Hoopla, AMC+. Compare all streaming options for this movie on WhereCanIWatch.tv.
Invasion of the Neptune Men
Top Pick
Stream on Apple TV+
HD · Included
About
You can watch Invasion of the Neptune Men (1961) for free on Hoopla.
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.
Shinichi Tachibana must balance his quiet life as an astronomer with the loud, metallic chaos of being a child's favorite superhero. This campy relic trades logic for practical effects and an electric barrier meant to keep alien invaders at bay.
Trailer
Director
Koji Ota
Cast
Sonny Chiba, Shinjirō Ehara, Ryuko Mizukami, Mitsue Komiya, Seiichirō Kameishi, Shiro Okamoto, Rinichi Yamamoto, Kappei Matsumoto, Takashi Kanda, Ken Sudo
You might also like
See all →
Best way to watch
8 options ranked by value · 🇺🇸 United States
Free with ads
Included with subscription
Last verified 25 days ago
Invasion of the Neptune Men
You can watch Invasion of the Neptune Men (1961) for free on Hoopla.
Director
Koji Ota
Cast
Sonny Chiba, Shinjirō Ehara, Ryuko Mizukami, Mitsue Komiya, Seiichirō Kameishi, Shiro Okamoto, Rinichi Yamamoto, Kappei Matsumoto, Takashi Kanda, Ken Sudo
8 options ranked by value · 🇺🇸 United States
Keep browsing: New Releases · Popular Movies · Science Fiction · Action
alien invasion · planet neptune
Invasion of the Neptune Men is streaming on Apple TV+. Watch Invasion of the Neptune Men for free on Hoopla. Invasion of the Neptune Men is streaming on AMC+. Invasion of the Neptune Men is streaming on Philo. Invasion of the Neptune Men is streaming on YouTube TV. Invasion of the Neptune Men is streaming on AMC. Invasion of the Neptune Men is streaming on AMC+ Amazon Channel. Invasion of the Neptune Men is streaming on Shout! Factory Amazon Channel. Invasion of the Neptune Men is not currently available on Netflix, Hulu, Max, Disney+, Prime Video. Availability last verified June 20, 2026.