The Kamen Rider Amazon movie is a theatrical version of episode 16, Garander's Tokyo Sea of Flames Operation!!, depicting Gengoro Beastman's attempt to execute Garanda's Tokyo Sea of Flame plan.
| Actor | Role |
|---|---|
| TTōru OkazakiDaisuke Yamamoto / Kamen Rider Amazon | Daisuke Yamamoto / Kamen Rider Amazon |
 Akiji KobayashiTōbei Tachibana | Tōbei Tachibana |
 Yoji MatsudaMasahiko Okamura | Masahiko Okamura |
| MMariko MatsuokaRitsuko Okamura | Ritsuko Okamura |
 Ryuji SaikachiMogura Beastman (voice) | Mogura Beastman (voice) |
 Hirohisa NakataGreat Emperor Zero | Great Emperor Zero |
 Kazuo HayashiDiving Beetle Beastman (voice) | Diving Beetle Beastman (voice) |
 Mitsuo AndōBusiness Merchant (Diving Beetle Beastman Human Form) | Business Merchant (Diving Beetle Beastman Human Form) |
 Gorō NayaNarrator (voice) | Narrator (voice) |