Kamen Rider Kamen Rider Episode 4 Cannibalism, Sarracenian ( Air Date 1971-04-24 ) Genre Action & Adventure, Sci-Fi & Fantasy, Drama category. Overview "At an amusement park's botanical gardens, people begin to go missing. The young boy Kenji's older sister Yukie gets snatched away, and he tries to tell someone that his sister was attacked by a giant King Sarracenian!!".