Onyanko Club (おニャン子クラブ, Onyanko Kurabu, "Kitty Club") was a large all-girl Japanese pop idol group in the 1980s. Some members of the group participated in spin-off groups, such as Nyangilas, Ushiroyubi Sasaregumi and Ushirogami Hikaretai. Many of the latter two groups' songs were used as theme songs of the popular 80s anime series High School! Kimengumi and Tsuide ni Tonchinkan. Several big-name idols stemmed from the group; one of the best known being Shizuka Kudo. The group was produced by Hiroshi Ishida and Kazuji Kasai, both of whom were producers of Fuji TV's show Yūyake Nyan Nyan.