|This article is about a/an robot in Kamen Rider Zi-O.|
Kurogane Oogama (クロガネオオガマ Kurogane Oogama, lit. "Iron Giant Frog") is a frog-based Karakuri Robo that supplies weapons, armor and other equipment to Kamen Rider Shinobi. It can transform from Frog Mode to a humanoid Robot Mode.
In a dream of New Year's Day 2022 experienced by Sougo Tokiwa on January 1st, 2019, the Kurogane Oogama appears to transform Rentaro Kagura into Kamen Rider Shinobi so he can save Sougo from the Dustards.
- In Robot Mode, it resembles the Beast General Fighter Battle Gammer, while the head design is an homage to character Ono Riki from Shotaro Ishinomori's Hyouga Senshi Gaislugger.