R-17 cast, including all of the TV shows R-17 actors and actresses with photos and actor bios (7 Items). This full list of the cast of R-17 covers Season 1 on, including all R-17 cast members. If you are wondering, "What are the R-17 actors' names?" or "Who starred on R-17?" you can sort this alphabetical list by R-17 characters and their pictures. List features Seiichi Tanabe, Yuma Ishigaki and more. Click any actor's name to read more information. This list includes the casts of all R-17 episodes.