Ridewatches

The Ridewatches (ライドウォッチ) are pocketwatch-like devices that contain the power of past Kamen Riders, used by the Riders in Kamen Rider Zi-O.

Overview
to be announced

Functionality
A Ridewatch's dial is turned 90 degrees clockwise, causing its arrow to face the direction it is inserted into the Ziku-Driver. Its button is pressed to activate it, and it is inserted into its proper slot on the Ziku-Driver before the Driver is rotated 360 degrees to transform. Zi-O and Geiz's personal Ridewatches are inserted into the right-hand slot to access their base forms, and Ridewatches based on past Kamen Riders are inserted to the left-hand slot to access Armor forms based on those Kamen Riders.

Design
to be added

List of Ridewatches
{{#tag:tabber| Personal= {{#tag:tabber| Zi-O= 1={{Quote|(Digital beeping) Zi-O!|Activation announcement |Kamen Rider Zi-O}} 2={{Quote|Ridewatch de Tatakau Tokei no Rider wa... (Clock ticking noise) Zi-O da!|Secondary activation announcement}} 3={{Quote|The clock Rider who uses Ridewatches to fight is... (Clock ticking noise) Zi-O!|Secondary activation announcement translation}} 4={{Quote|Time Majin!|Summoning announcement}} 5={{Quote|Rider Time! Kamen Rider Zi-O!|Transformation announcement |Kamen Rider Zi-O}}
 * {{nihongo|Zi-O Ridewatch|ジオウライドウォッチ|Jiō Raido Wotchi}}: The personal Ridewatch of Kamen Rider Zi-O accesses his default form. Dated 2018 AD.

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Unused Ridewatches
The DX Transformation Belt Ziku-Driver toy can be hacked via pin combinations to reveal the names of possible Ridewatches with no confirmation on their appearance in the show, listed as follows:

Portrayal
The Ridewatches are voiced by Rikiya Koyama (小山 力也), who 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. He also voiced other equipment in Kamen Rider Zi-O.

Appearances

 * Icon-build.png Kamen Rider Build
 * Kamen Rider Build: Be The One
 * Episode 49: The Tomorrow Build Will Create
 * Zi-O_logo.png Kamen Rider Zi-O
 * Episode 1: Kingdom 2068