Heisei Kamen Rider 10th Anniversary

The Heisei Kamen Rider 10th Anniversary (平成仮面ライダー10周年プロジェクト 秋の陣) was commemorated in 2009 with the broadcast of Kamen Rider Decade, the tenth entry of the revived Heisei Kamen Rider Series.
 * In an unprecedented move, the Decade TV series itself was wholly devoted to uniting all Heisei Kamen Rider series; the eponymous Kamen Rider, who is fated to one day destroy his predecessors in a Rider War, uses the Rider Cards to Kamen Ride into the forms of his predecessors. Throughout the series, Decade traveled through "A.R. Worlds" based on the settings of the prior series. Eventually, elements from the original Showa Rider series were incorporated as well.
 * The film Kamen Rider Decade: All Riders vs. Dai-Shocker united all leading Kamen Riders up to Decade.
 * In September, Decade was succeeded by Kamen Rider W, officially described as the Heisei Kamen Rider 10th Anniversary Project: Fall Campaign (平成仮面ライダー10周年プロジェクト 秋の陣).
 * In December, Kamen Rider × Kamen Rider W & Decade: Movie War 2010 served as a conclusion to Decade, commencing an annual series of theatrical Movie War crossovers.