Ultraman vs. Kamen Rider is a crossover superhero television special that aired on July 21, 1993 which was originally made to commemorate the 25th anniversary of the Ultra Series and the 20th anniversary of the Kamen Rider Series, featuring clips from the various series from over the years, interviews with two of the stars, and finally a team-up between Tsuburaya Productions' Ultraman and Toei Company's Kamen Rider. Wikipedia