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When Yuriko investigates increased volcanic activity in the Mt. Fuji area, she learns the story of a modern-day Tarzan named Takeru, who is rumored to live in the region's dense woods since becoming lost within them 15 years ago. Meanwhile underground volcanic energy creates boiling temperatures in a lake at the foot of the mountain and a huge boulder erupts from the waters. Because the rock obstructs a main travel route, it is blasted apart with dynamite and the pieces are transported back into the forest. At one night, the pieces collect around a strange luminescent rock, creating an enormous rock monster called Gorgos that lives and breathes like an animal.
Episodes
1Defeat Gomess! 2Goro and Goroh 3The Gift From Space 4Mammoth Flower 5Peguila is Here! 6Grow Up! Little Turtle 7S.O.S. Mount Fuji 8Terror of the Sweet Honey 9Baron Spider 10The Underground Super Express Goes West 11Balloonga 12I Saw a Bird 13Garadama 14Tokyo Ice Age 15Kanegon's Cocoon 16Garamon Strikes Back 17The 1/8 Project 18The Rainbow's Egg 19Challenge from the Year 2020 20The Undersea Humanoid Ragon 21Space Directive M774 22Metamorphosis 23Fury of the South Sea 24The Idol of Goga 25The Devil Child 26Blazing Victory 27The Disappearance of Flight 206 28Open Up!