|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 Toad") is a toad-based robot that supplies weapons, armor and other equipment to Kamen Rider Shinobi. It can transform from Toad 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.
- Kurogane Oogama and its transformation to Toad Mode is a homage to the Super Stealth Beast God Gammer from Ninja Sentai Kakuranger.
- In Robot Mode, it resembles the Beast General Fighter Battle Gammer.
- It's head design in its robot mode is an homage to character Ono Riki from Shotaro Ishinomori's Hyouga Senshi Gaislugger