Nezura 1964

1963 Summer. The president of the Daiei Film is in need of a new hit. He's convinced by his special effects director to make a giant monster movie - but to outdo the competitors, a "Giant Horde Beast" feature. They set out to make a movie "in which hundreds of giant rats attack". Successful test footage is shot, and production is set.. However, disaster looms as a new threat emerges.