Fun little Toho Japanese movie that is, thankfully, not about Godzilla. No, this time it''s about, yes, a flying submarine! Evil aliens have submerged themselves underground and hijacked the government's latest hi-tech submarine in order to Take Over The Earth. But wait, the Government has even a MORE high-tech sub in the wings! And, even though the bad guys warn us to not use it. they do! YAY! Nice cinematography and some good special effects, but, like in all Japanese sci-fi movies, the pacing is somewhat ho-hum.