Musou Saber

"Lock On! 1, 10, 100: (Lockseed) 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

"Soiya! Fresh Orange Au Lait/Sparking!"

- Gaim Fresh Orange Arms' finisher announcement via Sengoku Driver

"Soiya! Melon Squash!"

- Zangetsu Melon Arms' finisher announcement via Sengoku Driver

The Musou Saber (無双セイバー) is Kamen Rider Gaim/Gaim Yami, Zangetsu, Bujin Gaim, and Jam's side weapon. It can also be summoned through the Heisei Rider Lockseed: Gaim Arms by Ren Aoi and can also be summoned through Gaim Kiwami Arms' summoning ability. Drive can also use this weapon, alongside the Daidaimaru, when he transforms into Type Fruit.

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, Zangetsu, and Jam 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)
 * Daidaimaru + DJ Gun: Sojinto Mode (双刃刀モード) (toy only, yet to be used in the series)

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.

Finishing attacks
By inserting a Lockseed into the Drive Launch (ドライブランチ) and locking it in place, Gaim, Zangetsu, or Jam can perform a Fruit 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, as well as 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. The Musou Saber also has an unused finisher, the Musou Shot (無双ショット), which is activated by pulling on the Pallete Slide beforehand.
 * Musou Saber: Musou Zan (無双斬)
 * 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 and charges the Musou Saber with pineapple-shaped energy before slashing the enemy.
 * 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.
 * Orange Charge (オレンジチャージ): By locking the Orange Lockseed, Gaim charges the Musou Saber with Orange-shaped energy producing an effect of sparks around the Musou Saber and slashes the enemy. This version has not combine with Daidaimaru.
 * Fresh Orange Au Lait (フレッシュオレンジオーレ): TBA
 * Melon Musou Zan (メロン無双斬): After Zangetsu activates his Sengoku Driver's Squash function, he charges the Musou Saber with melon-shaped energy before slashing the enemy.
 * 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 for close-quarters combat; a straight slash version for a single target and a 360 degree turn slash version that forms blood orange slices on contact with the target.
 * Fresh Orange Sparking (フレッシュオレンジスパーキング): TBA
 * DJ Gun Taiken Mode: Hinawa Daidai Musou Zan (火縄大橙無双斬)
 * Kachidoki Charge (カチドキチャージ): Unlike the Musou Saber and Daidaimaru Naginata Mode, Gaim must lock the Kachidoki Lockseed into the DJ Gun's Drive Bay, where he ignites the blade in flames before unleashing a powerful slash on the enemy.
 * Kiwami Au Lait (極(きわみ)オーレ): After Gaim activates his Sengoku Driver's Au Lait function, he charges the DJ Gun in Taiken Mode with energy surrounded by image projections of fruits before slashing down the target. The fruit image projections scatter on impact.

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).