Read more about Kamen Rider Den-O at: Wikipedia

Official Site: Bandai

is the primary protagonist and eponym character of the 2007 Kamen Rider Series, Kamen Rider Den-O.

is a young man with an intense streak of bad luck. Having lost his parents at a young age, he lived with his grandmother and older sister Airi, visiting his parents' library/café called the Milk Dipper as often as possible. He also kept a photograph of his parents until he lost it, regretting that day ever since. He and Airi eventually reopen the Milk Dipper along with Airi's fiance. However, her fiance mysteriously disappears a month before their wedding and she is suddenly struck with amnesia of all events relating to him. Ryotaro begins to take care of Airi and help at the Milk Dipper. He makes sure that she is always happy and never reminded of her fiance and become burdened by the loss, even though he questions if it is right for Airi to forget completely. Ryotaro will help anyone in need if he has the ability to do so, regardless of his bad luck; he also refuses to accept self-sacrifice as the only means to protect others.

One day early in 2007, Ryotaro comes across the Rider Pass, the DenLiner, Hana, and becomes possessed by the Imagin Momotaros. Hana discovers that Ryotaro is a Singularity Point, a human immune to changes in history as well as the lure of the Imagin's wish granting. This traps Momotaros in Ryotaro's body and enables both to become Kamen Rider Den-O ( ). As such, Ryotaro is drafted by the Owner of the DenLiner to become a keeper of space-time; Kamen Rider Den-O destroys Imagin that travel to the past to change the future, enabling that the future of the humans remains intact. Along the way, Ryotaro becomes contracted to the Imagin Urataros, Kintaros, and Ryutaros (collectively called the Tarōs), enabling Den-O to transform into additional forms.

Ryotaro also discovers the existence of Yuto Sakurai, the younger incarnation of his sister's fiance, and his Imagin partner Deneb who become Kamen Rider Zeronos. The group also help the Imagin Sieg who nearly ceases to exist, and later use his partnership with Ryotaro to fight the evil Kamen Rider Gaoh when the Edo period is threatened (the events of Kamen Rider Den-O: I'm Born!). It is also in this travel back in time that Ryotaro meets his younger self dubbed "Kotaro" who becomes Kamen Rider Mini Den-O to help with the fight. When three of the Tarōs' existence is threatened by their part in defeating Gaoh, Ryotaro's feelings for the friendship he has with them creates the cellphone, bringing them back to life and allowing him to become .

Kamen Rider Den-O has not been a contender in any CBUB matches.