Sure the film is silly if you're not a fan of the Japanese monster movie genre. But if one catches the right version of this film, which is the original American dubbed version, and not the grotesque Sandy Frank re-dub that's been deservedly sent up on MST 3000 many times, then you'll end up watching instead a credible entry in the "kaiju" genre that was the first effort by Toho rival Daiei to come up with their answer to Godzilla.
The original Japanese version (and the Frank redub) has some particularly horrible scenes involving American Air Force personnel in the opening, including among others a would be actor playing the general who looks and sounds like he's auditioning to replace Curly in a Three Stooges short. The original US version thankfully replaces all of these scenes with more credible looking ones featuring some professional actors, especially Dick O'Neill ("The Taking Of Pelham One Two Three") as the general who is so good you wish he'd been in the rest of the movie instead of over the hill Brian Donlevy who plays the US general in charge of the operation.
The original Japanese version (and the Frank redub) has some particularly horrible scenes involving American Air Force personnel in the opening, including among others a would be actor playing the general who looks and sounds like he's auditioning to replace Curly in a Three Stooges short. The original US version thankfully replaces all of these scenes with more credible looking ones featuring some professional actors, especially Dick O'Neill ("The Taking Of Pelham One Two Three") as the general who is so good you wish he'd been in the rest of the movie instead of over the hill Brian Donlevy who plays the US general in charge of the operation.