The Opening and Closing Loading Door-Ju (開閉装填ドア銃 Kaihei Sōten Doa Jū, lit. "Door Gun") is a firearm weapon wielded by Kamen Rider Drive, resembling Tridoron's passenger-side door. It first appears in episode 8. Like the Handle-Ken, Shinnosuke names this weapon for the car door attachment on the barrel's side, and Mr. Belt disapproves of his lackluster choice. When the Door-Ju is summoned, it comes from the front portion of Tridoron's hollow section. In episode 42, the Door-Ju was stolen from Drive and used by Gold Drive during their first battle with each other.