Kamen Rider 40th Anniversary

The Kamen Rider 40th Anniversary was commemorated in 2011, which saw the broadcast of Kamen Rider OOO, followed by Kamen Rider Fourze. It was concurrent with the .
 * A special two-part arc encompassing episodes 27 and 28 of OOO, the latter of which marked the 1000th episode milestone of Kamen Rider as well as falling on April 3rd, 40 years following the premiere of the original series.
 * In April, OOO, Den-O, All Riders: Let's Go Kamen Riders was theatrically released as the 40th anniversary movie.
 * On September 4th, the premiere episode of Kamen Rider Fourze was immediately preceeded by an eyecatch of Kamen Rider 1 doing his signature pose with his logo in the background and music from the original show.
 * In December, Kamen Rider × Kamen Rider Fourze & OOO: Movie War Mega Max featured the return of the Seven Legendary Riders''.