Surprised this hasn’t been re-released given it's pedigree and place among 60s Japanese sci-fi horror (and in some ways this movie is way more Shochiku than Toho). The story weaves the Nazi Germany origins of the monster (incl. a brief appearance by Takashi Shimura) into the more modern setting of Japan. Here the creature is the result of radiation contamination in Hiroshima after the atomic bombing during WWII. Does this sound familiar? Honda uses the Shelley's classic story to provide…
I get the charm and novelty of this Hammer/Shaw mash-up but I wouldn’t classify this as a better representation from either studio. However, together they’ve found a unique balance. In essence 1+1=3 in this case. The fighting scenes aren’t great and the Hammer elements only serve to drive the plot. Neither executed very well but combined it becomes an entertaining watch. Fun to see Peter Cushing so active in fighting the vampires. Plenty of replay value.