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- For his A.R. World counterpart seen in Kamen Rider Decade, see Masahiko Okamura (A.R. World).
Masahiko Okamura (岡村 まさひこ, Okamura Masahiko) is the nephew of professor Kōsaka and Amazon's first friend in Japan, helping him in anyway he can. In Episode 13, it is shown that Masahiko teaches Amazon to speak coherent Japanese. Masahiko attends Johnan Elementary School.
In Shin Kamen Rider Spirits, Masahiko reappears to support the Riders, who is now a teenager and enjoys cycling.

Teen Masahiko
Behind the scenes[]
Portrayal[]
Masahiko Okamura was portrayed by Yoji Matsuda (松田 洋治, Matsuda Yōji). Coincidentally, Kamen Rider Amazon premiered on his seventh birthday.
Appearances[]
Kamen Rider Amazon
- Episode 1: Man or Beast? The Cool Guy Who Came From the Jungle!
- Episode 2: Jyumenki! God or Devil?
- Episode 3: The Strong, Naked, Fast Guy!
- Episode 4: Run! The Raging Jungler
- Episode 5: The Weirdo Who Came From Underground!!
- Episode 6: The Inca Rope-Pattern Writing Mystery!!
- Episode 7: Melt! Melt! The Terrifying Snake Beastman
- Episode 8: The Crocodile Beastman Who Attacked the School
- Episode 9: Go, Amazon! The Crab Beastman's Island!
- Episode 10: Black Cat Beastman Aiming at the Nursery School!
- Episode 11: The Golden Snail's the Reaper's Envoy!?
- Episode 12: Seen! Gedon's Beastman Modification Room
- Episode 13: Approaching! Jyumenki! Danger, Amazon!!
- Episode 14: The Jyumenki Dies! And a New Enemy?
- Episode 15: He Came Forth! The Terrible Zero the Great
- Episode 16: Garander's Tokyo Sea of Flames Operation!! (theatrically screened as Kamen Rider Amazon)
- Episode 17: Mt. Fuji Big Explosion? The Tokyo Fry Pan Operation
- Episode 18: Zero's Terror! The Massive Earthquake Operation!!
- Episode 19: Going into Action, The Garander Youth Squad
- Episode 20: Mole Beastman's Last Activity!!
- Episode 21: Cannibal Beastman to Eat the Frozen Rider
- Episode 22: Inca Doll's Day to Annihilate Greater Tokyo
- Episode 23: Fake Riders vs. Amazon Rider!
- Episode 24: You Did It, Amazon!! The End of Zero the Great!!
Kamen Rider 1 Through RX: Big Gathering (archive footage only)
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Kamen Riders |
Amazon |
Debatable: Salamander Beastman |
Gear |
Transformation Gear: GiGi Armlet |
Other Gear: Condorer - GaGa Armlet |
Rider Machines: Jungler |
Allies |
Tobei Tachibana - Masahiko Okamura - Ritsuko Okamura - Mole Beastman - Elder Bago - Professor Taro Kosaka |
Gedon |
Leader: Jyumenki Golgos |
Gedon Beastmen: Spider Beastman - Vampire Bat Beastman - Mantis Beastman - Large Centipede Beastman - Mole Beastman - Porcupine Beastman - Snake Beastman - Crocodile Beastman - Crab Beastman - Black Cat Beastman - Snail Beastman - Ant Beastman - Dobsonfly Beastman |
Footsoldiers: Red Followers |
Garander Empire |
Leaders: Ruler - "Zero the Great" |
Garander Empire Beastmen: Bee Beastman - Diving Beetle Beastman - Toad Beastman - Tiger Beetle Beastman - Owl Beastman - Mushroom Beastman - Sea Anemone Beastman - Japanese Dwarf Flying Squirrel Beastman - Salamander Beastman |
Footsoldiers: Black Followers |
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