The second theatrical film directed by Shinpei Hayashiya, a rakugo master (comic storyteller).
Raiga, the evolved version of the deep-sea aquatic dinosaur “Reigo” from his first film Deep
Sea Monster Reigo, runs rampant in the town of Asakusa! …

It has been over six decades since the battle of Deep Sea Monster Reigo and Battleship
Yamato. As global warming worsens, throwing the ecosystem off balance, a disaster
approaches Japan. A mysterious, massive creature emerges from the nearby ocean and a
fishing boat encounters an ominous deep-sea creature in Tokyo Bay. Then a giant monster
“Raiga” lands in Asakusa, Tokyo! The Taito Guard is called out at the request of the
government, and a cut-throat battle beyond all imagination begins…

Set 60 years after the events from the previous film “Deep Sea Monster Reigo”, the threat of
global warming is causing the southern polar ice-cap to slowly melt. Because of this, the
ecosystem is disturbed and sea monsters are heading to Japan. [As] if things couldn’t get any
worse, a huge sea monster by the name of Raiga arrives at Asakusa and begins its path of
destruction on the town.