Kamen Rider W is a 2009–2010 Japanese tokusatsu drama, the eleventh series in the Heisei period run of the Kamen Rider Series and the twentieth overall. It premiered on September 6, 2009 following Kamen Rider Decade's finale, and aired alongside Samurai Sentai Shinkenger in TV Asahi's Super Hero Time programming block. Following Shinkenger's finale on February 7, 2010, it aired alongside Tensou Sentai Goseiger, until W concluded on August 29, 2010. The series has been described as the "Heisei Kamen Rider 10th Anniversary Project: Fall Campaign" . The series is notable for being the first installment in what is often considered the second phase of Heisei-era Kamen Rider. A sequel manga series, Fuuto PI, began serialization in August 2017 and an anime adaptation began airing in August 2022.