Masahiko Okamura

Masahiko Okamura (岡村 まさひこ): The nephew of professor Kōsaka and Daisuke'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 Jonan Elementary School.

Portrayal
Masahiko Okamura was portrayed by Yōji Matsuda (松田 洋治). Coincidentally, Kamen Rider Amazon premiered on his seventh birthday.