Professor Taro Kosaka

: He knew the nature of the Gigi Armlet and his nephew Masahiko become Daisuke's friend. He is murdered by the Spider Beastman.
==Behind the scenes==
===Portrayal===
Professor Kosaka was portrayed by .
==Appearances==
* Kamen Rider Amazon
**Episode 1: Man or Beast? The Cool Guy Who Came From the Jungle!
* Birth of the 10th! Kamen Riders All Together!! 
* Kamen Rider 1 Through RX: Big Gathering 
Category:Deceased
Category:Kamen Rider Amazon
Category:Allies
Category:Civilian
Category:Amazon Characters