This article is about a/an transformation belt in Kamen Rider Kuuga.


The Arcle (アークル Ākuru) is Kuuga's transformation belt. An ancient belt created by the Linto Tribe and used by the original Kuuga, Riku. While being attacked by Zu-Gumun-Ba, Yusuke grabbed the belt and after putting it on, it immediately fused into his body.

When he transforms, it reappears around his waist and is always the same color as his current form. A stone embedded in the belt, called Amadam (アマダ Amadamu), is the source of Kuuga's power and able to extend the lifespan of a person. Furthermore, the Amadam is present on Daguva, Gouram, and (in Kuuga's World in Decade) Gamio as well.

Another Arcle, a prototype version, was also created, but it lacked the Amadam, which keeps the user from going berserk. Mika however, discovered it and wore it, becoming the second Kuuga in the novel.

When Yusuke asked Sakurako the meaning of the symbols on the Arcle's sides, Sakurako said that it translates to "power".


Main article: Amadam (Stone)

The Amadam was, as Sakurako Sawatari found in the Linto scriptures, powered by the user's will and would corrode a weak user. Gooma went berserk when an unrefined fragment of Daguva's Amadam was forced directly into his body. Gouram's Amadam reacts to Kuuga that if its master's will becomes clouded with power (referring to the ancient Linto inscription: "when the holy spring dries up"), Gouram will start to crumble and be reduced to dust. Additionally, the Arcle also acts as a stabilizer to the bearer in order to prevent them from going berserk due to the power of Arcle as seen when the first user, later Mika, went out of control due to lack of this stone on their Arcle.

World of Kuuga

In this world the Arcle was given to Yusuke Onodera by Narutaki. It is unknown if the Ultimate Darkness sealed in the tomb was the true leader of the Gurongi, or if it was this world's first Kuuga, as the belt was found near his sealed remains.


Bandai's toy version of the Arcle was called the "Sonic Wave DX Henshin Belt".

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