Ishirô Honda
A giant, cannibalistic humanoid's rampage through Tokyo is halted by his more docile twin, but neither their reunion nor their scientist caretakers can prevent their eventual duel.
An experimental lab animal called a gargantua escapes from his captors and is suspected to be the creature that is killing people all over the countryside. But when the gargantua from the lab appears at the same time as the evil gargantua, the two begin to battle across Japan.