Supposedly a sequel to Frankenstein Conquers the World (1965) make no mistake that the two movies have zero connection and you won’t be seeing Frankenstein joining the fray here.
Another Toho monster film it see’s two giant monsters appear and the threat they may pose to mankind.
The monsters are dudes in monster suits and to the films credit actually don’t look all too bad. The rest of the sfx are what you’d expect from Toho so lots of miniatures and the usual array of scores.
So the general premise is monster vs monster vs mankind, we’ve seen it before and it’s one of those mixed bag concepts that usually misses more than a beat. Sadly it doesn’t really work here, we have our good monster, we have our bad monster, we have the scientific protagonists and we have the gung-ho military but none are exactly engaging.
I actually went into this with fairly high hopes but sadly they weren’t met. I like Toho but generally their serious work is considerably better than the likes of this, especially when the monster movie isn’t part of the Godzilla universe.