Kamen Rider Den-O is the seventeenth installment in the popular Kamen Rider Series of tokusatsu programs. It is a joint collaboration between Ishimori Productions and Toei. It premiered January 28, 2007 on TV Asahi, and concluded airing on January 20, 2008. Its lead actor Takeru Satoh is the first Kamen Rider Series lead born in the Heisei period of Japanese history. It aired on the Super Hero Time slot alongside Juken Sentai Gekiranger. The series revolves around time travel, trains, and personalities. It follows Ryotaro Nogami, an unlucky young man who becomes Kamen Rider Den-O with the help of time-traveling Imagin. The show combines elements of comedy, action, and drama with a focus on time manipulation and the relationship between Ryotaro and the Imagin.