"放送大学の地上波放送が9月30日終了。BS完全移行でHD/SD 2ch同時放送" [Terrestrial broadcasting of the Open University of Japan will end on September 30, 2018, with the full transition to satellite broadcasting.]. AV Watch (in Japanese). 2018-03-02. Retrieved 2021-10-07.
japansauce.net
"Kunoichi". Japan Sauce. 3 June 2018. Archived from the original on 26 May 2024. Retrieved 26 May 2024.