The best Hideo Shibuya’s horror movies

Gaira, a humanoid sea beast spawned from the discarded cells of Frankenstein's monster, attacks the shores of Tokyo. While the Japanese military prepares to take action, Gaira's Gargantua brother, Sanda, descends from the mountains to defend his kin. A battle between good and evil ensues, leaving brothers divided and a city in ruins.

During WWII, Germans obtain the immortal heart of Frankenstein's monster and transport it to Japan to prevent it being seized by the Allies. Kept in a Hiroshima laboratory, it is seeming lost when the United States destroys the city with the atomic bomb. Years later a wild boy is discovered wandering the streets of the city alone, born of the immortal heart.

In an effort to find an economic means of purifying salt water, a joint U.S.-Japanese military command is set up on an isolated Japanese island where an unusual salt water lake is situated. However, their purifying experiments arouse the prehistoric monster Obaki from hibernation at the lake's bottom, and it proceeds to attack Japan.

Nuclear tests create a radioactive man who can turn people into slime.

A librarian is subject to a scientific experiment which goes wrong and transforms him into 'The Human Vapour'. He uses his new ability to rob banks to fund the career of his girlfriend, a beautiful dancer. The Human Vapour is ruthless in his quest for money and kills anyone who stands in his way, especially police. He soon becomes Tokyo's most wanted criminal. Can he be stopped before he kills again?

When a rare species of butterfly is found in a mysterious valley in Japan, a pair of entomologists go to investigate and find more. However, when they get there they find an uncharted lake and as they are observing it they are caught in a landslide and killed. A reporter named Yuriko, the sister of one of the men decides to go to the area to find out what exactly happened. She is accompanied by another entomologist named Kenji and a reporter named Horiguchi. When they get to the village where the men were last seen alive they find out about a legend regarding a giant monster. They soon find out that it is not a legend and the monster named Varan is very much alive. Soon Varan leaves the valley where he has lived for millions of years and is heading for Tokyo.