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.

• Ishimori Productions
• Toei Company
• Dori Sakurada
• Masahiro Inoue
• Takuya Mizoguchi
• Kimito Totani
• Tamaki Matsumoto
• Rina Akiyama
• Kenjirou Ishimaru
• Kanna Mori