佐藤健
The eighth series, "Kamen Rider Den-O", followed in 2007. Differing from past Kamen Rider series, it introduces a rider who is unsure of himself. The series has a large vehicle, the DenLiner: a bullet train which can travel through time. Although the series has only two riders (Den-O and Zeronos), they have multiple forms similar to Black RX, Kuuga, and Agito. Due to "Den-O" popularity, a second film crossover with the 2008 series "Kamen Rider Kiva" was released on April 12, 2008. The top film in its opening weekend, it grossed ¥730 million. In addition, Animate produced an OVA, "Imagin Anime", with SD versions of the Imagin. A third film, "" (with two new riders) was an epilogue for the series. According to Takeru Satoh, who played the lead character of Den-O in the television series and first three films, the series was successful because of its humor.