Daidaimaru

"Soiya! Orange Squash!"

- Finisher announcement via Sengoku Driver

The Daidaimaru (大橙丸) is Kamen Rider Gaim and Kamen Rider Fifteen's weapon while in Orange Arms and Gaim Arms respectively, which is a sword that has the blade look like a slice of an orange. This weapon is accessed through the Orange Lockseed.

The Daidaimaru can combine with the Musou Saber for the more powerful Naginata Mode (ナギナタモード).

When Gaim activates his Sengoku Driver's Squash function, he can execute the Daidai Ittou (大橙一刀), where he charges the Daidaimaru with energy before unleashing a series of slashes on the target.

A crimson version of the Daidaimaru is wielded by Kamen Rider Bujin Gaim while in Blood Orange Arms.