Ziku-Driver

The Transformation Belt Ziku-Driver (変身ベルトジクウドライバー) is the transformation device used by both Kamen Rider Zi-O and Kamen Rider Geiz. It uses Ridewatches as its primary collectible device.

Design
The Ziku-Driver is composed of the following parts:
 * The D '9 Slot (Ｄ‘9スロット) is the right-hand slot for inserting transformation Ridewatches.
 * The D '3 Slot (Ｄ‘３スロット) is the left-hand slot for inserting Ridewatches to access Rider Armors.
 * The Ride On Ruser (ライドオンリューザー) is a button which unlocks the Ziku Circular and the approval key of each Ridewatch that was inserted.
 * The Ziku Circular (ジクウサーキュラー) is the main unit of the Ziku Driver. By rotating it 360 degrees, it spreads and loads the data of the Ridewatches set into the slots at both ends into concentric circles and transfers it to the Ziku Matrix. The energy generated by its rotary motion that is accelerated and amplified for use in transformation and finishers.
 * The Ziku Matrix (ジクウマトリクス) is the theoretical realization device of the Ziku Driver located behind the Ziku Circular.It realizes the data of the inserted Ridewatches, transmitted by the Ziku Circular, as equipment and armor.
 * The Sight Window (ザイトウインドー) is the display of the Ziku Driver. In addition to the time coordinates of Ridewatches, the Rider's current form is also displayed.

Transformation
To transform, the user inserts the Ridewatch into the D '9 Slot before pressing the Ride On Ruser and rotating the Ziku Circular 360 degrees. To assume a Rider Armor form, the user inserts a second Ridewatch into the D '3 Slot and performs the same procedure.

Finishers
To activate a finisher, the user presses the Ride On Starter on any Ridewatches inserted into the Ziku Driver before pressing the Ride On Ruser and rotating the Ziku Circular 360 degrees.

Portrayal
The reading announcement part of Ziku-Driver is voiced by Rikiya Koyama (小山 力也), who also voiced Ohma Zi-O and previously voiced Paradox Roidmude in Kamen Rider Drive: Surprise Future, Kamen Rider Bujin Gaim in Kamen Rider × Kamen Rider Gaim & Wizard: The Fateful Sengoku Movie Battle, and physically portrayed Joe the Haze in Kamen Rider Black RX.

The song announcement part of Ziku-Driver is voiced by Yohei Onishi (大西 洋平).