Under the impression that they saved the World of Den-O, Tsukasa Kadoya (Kamen Rider Decade) and company begin their journey to the World of Kabuto when they are halted by Sieg who presents them a manuscript that detailed the legendary Oni Conquest with Momotaros' image on it. As this occurred, the Tarōs mysteriously vanish from the DenLiner as they are about to help Kotaro Nogami (Kamen Rider New Den‑O) out with the true threat to their world.
as Kotaro Nogami / Kamen Rider New Den-O
as Tsukasa Kadoya / Kamen Rider Decade
as Ryotaro Nogami / Kamen Rider Den-O
as Daiki Kaitou / Kamen Rider DiEnd
as Kohana
as Naomi
as Owner / Station Master
as Natsumi Hikari
as Eijirou Hikari
as Toki
as Yuu
as Yuuto Sakurai
as Jirou
as Riki
as Ramon
as Mimihiko · Silvara
as Kuchihiko · Goldora
as Chiyoko Shimizu
as Yasushi
as Akira
as Kenji
as Warrior
as Warrior
as Villager
as Villager
as Villager
as Fisherman
as Fisherman
as Fisherman
as Momotaros (voice)
as Urataros (voice)
as Kintaros (voice)
as Ryuutaros (voice)
as Sieg (voice)
as Deneb (voice)
as Teddy (voice)
as Gelknute (voice)
as Kamen Rider G3 (voice) / Gelknute (voice)
as Decade Driver (voice) / DiEnDriver (voice)
as Gelnewt (voice)
