This article is about a/an ally in Kamen Rider Amazon.

Professor Kosaka.

Professor Taro Kosaka (高坂 太郎 教授 Kōsaka Tarō Kyōju, 1): 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


Professor Kosaka was portrayed by Yoshiro Kitahara (北原 義郎 Kitahara Yoshirō).

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