This article is about a/an ally in Kamen Rider Amazon.
For her A.R. World counterpart seen in Kamen Rider Decade, see Ritsuko Okamura (A.R. World).

Ritsuko Okamura (岡村 りつ子 Okamura Ritsuko): Masahiko's big sister and Professor Kōsaka's niece. At first she doesn't trust Amazon due to bringing Geddon to Japan and causing chaos. After being constantly rescued and helped by Amazon she puts her faith and trust in him.

Behind the scenes


Ritsuko Okamura was portrayed by Mariko Matsuoka (松岡 まりこ Matsuoka Mariko).