More ideas of recurring villains for Captain Japan to fight

Hans Frankenstein (related to Victor Frankenstein) is a mad scientist is controls mutant creatures such as the Doras clones and the "Bio-Creatures". A former expert in genetic engineering driven mad by his own experiments, he is one of Destruction's recurring allies and one of Jamiko's most dangerous enemies. His has a powerful right-hand robot named Giga-Phantom who works as Frankenstein's field-commander. He's an expert in hand-to-hand combat and his main weapons are a shotgun and a giant energy-cannon.

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