Reigon: Devil of the Seabed
Reigon: Devil of the Seabed (海底の魔王 レイゴン is an unmade Kaitei no Maō Reigon)1966 Nikkatsu film, and a precursor to Gappa.
Reigon was the fourth and final unmade film in a series of concepts Nikkatsu Company had before making Gappa.
Reigon got the furthest into the development out of the four scrapped projects, receiving a plot synopsis, speculative screenplay, and kaiju ideas.
Planning was done by Hideo Kodama and the draft was written by Shunichi Yukimuro and Ryuzo Nakanishi.
A giant manta ray dubbed "Reigon" appears one day and wreaks havoc across the world--and then fights a giant iguana.
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