Musou Saber

"Lock On! 1, 10, 100! (Fruit) Charge!"

- Musou Saber's finisher announcement

"Lock On! 1, 10, 100, 1,000, 10,000! (Blood) Orange Charge!"

- Daidaimaru Naginata Mode's finisher announcement

"Lock On! 1, 10, 100, 1,000, 10,000, 100,000,000, 1,000,000,000,000, Muryodaisu! Kachidoki Charge!"

- DJ Gun Taiken Mode's standard finisher announcement

"Soiya! Kiwami Au Lait!"

- DJ Gun Taiken Mode's finisher announcement via Sengoku Driver

The Musou Saber (無双セイバー) is Kamen Rider Gaim/Gaim Yami, Zangetsu, and Bujin Gaim's side weapon, as well as Kamen Rider Fifteen's secondary weapon while in Gaim Arms. Gaim can also summon and utilize this weapon if he assumes Kiwami Arms.

The Musou Saber can be used as both a sword, which is known as Saber Mode (セイバーモード), and a gun, known as Gun Mode (ガンモード), at the same time. To activate the gun portion, Gaim and Zangetsu pull the Pallete Slide (パレットスライド) yellow tab in the back, allowing them to shoot at any range four times.

Combinations
For Gaim, the Musou Saber can combine with some of his Arms Weapons to become an alternate mode for more powerful attacks.
 * Daidaimaru: Naginata Mode (ナギナタモード)
 * Pine Iron: Kusarigama Mode (鎖鎌モード)
 * DJ Gun: Taiken Mode (大剣モード)

In Fresh Orange Arms, as Gaim is equipped with two Daidaimarus, he is also able to summon two Musou Sabers, allowing him to dual wield both Daidaimarus in Naginata Mode.

Fruits Charges
By inserting a Lockseed into the Drive Launch (ドライブランチ) and locking it in place, Gaim or Zangetsu can perform a Fruits Charge (フルーツチャージ) finishing attack, which is announced by the Musou Saber counting "1, 10, 100" (一、十、百). The Musou Saber can count higher to "1,000" (千) and "10,000" (万) while combined with the Daidaimaru, even further to "100,000,000" (億), "1,000,000,000,000" (兆), and "Muryodaisu" (無量大数) while combined with the DJ Gun.
 * Musou Saber
 * Ichigo Charge (イチゴチャージ): By locking the Ichigo Lockseed, Gaim can execute the Kunai Burst (クナイバースト), where he slashes upwards, creating a giant energy duplicate of the Ichigo Kunai. The kunai then changes into a giant strawberry before exploding into countless regular-sized kunai, which rain down on Gaim's enemy, detonating as they hit. This can also be done in multiple swings.
 * Daidaimaru Naginata Mode: Naginata Musou Slicer (ナギナタ無双スライサー)
 * Orange Charge (オレンジチャージ): By locking the Orange Lockseed, Gaim fires energy slashes from the Musou Saber end at the enemy, trapping them in an orange sphere. Afterwards, he charges the Daidaimaru end with energy before slashing the enemy with it. The Orange Charge has two variations for close-quarters combat; a multiple slash version for separate targets and a 360 degree turn slash version that forms orange slices on contact with the target.
 * Blood Orange Charge (ブラッドオレンジチャージ): By locking the Blood Orange Lockseed, Bujin Gaim charges the Daidaimaru end with energy before he slashes the enemy with it. The Blood Orange Charge has two variations; a straight slash version for a single target and a circle slash version for multiple targets.
 * Fresh Orange Au Lait (フレッシュオレンジオーレ): TBA
 * Fresh Orange Sparking (フレッシュオレンジスパーキング): TBA
 * DJ Gun Taiken Mode: Unlike the Musou Saber and Daidaimaru Naginata Mode, this weapon requires Gaim to insert a Lockseed into the DJ Gun's Drive Bay in order to initiate a finishing attack.
 * Kachidoki Charge (カチドキチャージ): By locking the Kachidoki Lockseed, Gaim can execute the Hinawa Daidai Musou Zan (火縄大橙無双斬), where he ignites the blade in flames before unleashing a powerful slash on the enemy. In Kiwami Arms, Gaim performs this attack using the Sengoku Driver's Au Lait function, where the ignited blade gains an aura which displays images of fruit that Kiwami Arms can use for their respective Arms Weapons.

Other finishing attacks

 * Pine Musou Zan (パイン無双斬): After Gaim activates his Sengoku Driver's Au Lait function, he restrains the opponent with the Pine Iron before assaulting the target with multiple slashes from the Musou Saber.
 * Hinawa Daidai Musou Zan (火縄大橙無双斬): After Gaim activates his Sengoku Driver's Au Lait function, Gaim ignites the DJ Gun's blade in flames and gains an aura which displays images of fruit that Kiwami Arms can use for their respective Arms Weapons, before unleashing a powerful slash on the enemy.

Portrayal
The voice of the Musou Saber, as well as the Lockseeds and the Sengoku Driver, is provided by Seiji Hiratoko (平床 政治).