Kamen Rider Black RX (仮面ライダーBLACK RX Kamen Raidā Burakku Āru Ekkusu?, Masked Rider Black RX) is a Japanese tokusatsu superhero television series produced as part of the Kamen Rider Series. The ninth show in the franchise, it was a joint collaboration between Ishimori Productions and Toei Company, and aired on the Mainichi Broadcasting System and the Tokyo Broadcasting System from October 23, 1988 to September 24, 1989 with a total of 47 episodes. The series was a direct sequel to Kamen Rider Black and the first to feature a team-up with the past Riders since the 1984 TV special Birth of the 10th! Kamen Riders All Together!!.