This wild comedy pokes fun at the world of pro-wrestling by placing its accomplished wrestler protagonist Koji Taguchi against a giant squid known as the Calamari Wrestler. The Calimari Wrestler not only proves to be Koji's most difficult opponent yet, but also has an effect on several people's personal lives when he becomes the unlikely object of a young girl's affection.

The Calamari Wrestler

In the year 2011 the greatest tectonic disaster in the history of mankind has occurred. As a result of the catastrophic earthquakes North and South America, Eurasia, Africa and Australia have sunken underwater while the Japanese islands remain untouched.

The World Sinks Except Japan

Tsukasa travels to his home world of the World of Decade, where he discovers the origin of his powers and his true heritage as the leader of Dai-Shocker. The film features all ten of the lead Heisei Kamen Riders, as well as all of the Shōwa period Kamen Riders, leading to a total of 25 Riders.