is a Japanese tokusatsu television series. The fourth installment to be produced as part of the Kamen Rider Series, the series aired in Japan from late 1974 to early 1975 on the NET and Mainichi Broadcasting System. It was the shortest Kamen Rider series ever, lasting only 24 episodes. While this was believed to be due to the show's heavy amounts of graphic violence, in reality, this was due to a pre-planned changeover between networks airing the program, from NET to MBS/TBS, which requested a clean break in airing series, thus resulting in a pre-planned end at episode 24. Its timeslot on NET was taken over by Himitsu Sentai Gorenger a week after its finale aired. Plot summary A plane crashes in the Amazon rainforest, leaving young Daisuke Yamamoto stranded without his parents. Soon adopted by an Incan tribe under the name "Amazon", he becomes a wild child, living off the land. However, his village is massacred by the Ten-Faced Demon Gorgos, who searches for the powerful GiGi Armlet to take over the world with it. The last Inca, Elder Bago, gives Daisuke the GiGi Armlet for safekeeping and uses his knowledge of Incan science and magic to perform a mystic ritual on Daisuke and transform him into the powerful "Kamen Rider Amazon" before dying. Now in Japan, Daisuke battles the evil organization Gedon, unaware of why they pursue him. Befriending Professor Kousaka's nephew and niece, Daisuke learns of the GiGi Armlet's true nature and ultimately defeats Gedon, then the Garanda Empire. Characters : Ally of the original Kamen Riders. Motorbike specialist. He helps Daisuke settle in Japan. : The nephew of professor Kōsaka and Daisuke's first friend in Japan, helping him in any way he can. At the end of Episode 12, Masahiko begins teaching Amazon to speak coherent Japanese. Masahiko attends Jonan Elementary School. : Masahiko's big sister. At first she doesn't trust Daisuke due to bringing Gedon to Japan and causing chaos. After being constantly rescued and helped by Daisuke she puts her faith and trust in him. : A molelike monster, nicknamed "Mogura", able to burrow underground and prone to chanting "chu-chu". The Mole Beastman was originally working for Gedon and was sent after Daisuke only to fall back due to police interference. After getting a chance to redeem himself, The Mole Beastman goes after Masahiko to set a trap for Daisuke which ended up with