Kamen Rider Black RX (仮面ライダーBLACK RX, Kamen Raidā Burakku Āru Ekkusu), known outside Japan as Black Kamen Rider RX, is a Japanese tokusatsu superhero television series produced as part of the Kamen Rider series. The ninth show in the franchise, it is 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. The series is 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!!.