TV Joker: Unforgiven Investigator Joker: Unforgiven Investigator 7/10 by 7 users Date Kazuyoshi (Sakai) is a detective on the Kanagawa prefectural police force. During the day, he is known as a "Buddha" for his gentle personality, pouring all of his energy into resolving each case. At night, however, he transforms into a cruel punisher as his gentleness gives way to his anger towards the criminals. The series poses questions about what justice and evil truly are. Tokyograph Details Casts Posters Images Title Joker: Unforgiven Investigator Alternative Titles Joker, Joker: Yurusarezaru Sōsakan, Joker: Yurusarezaru Sousakan First Air Date 2010-07-13 Last Air Date 2010-09-14 Number of Episodes 10 Number of Seasons 1 Genres Crime, Drama, Networks Fuji TV, Casts Masato Sakai, Ryo Nishikido, Anne Watanabe, Ryo, Hiroyuki Hirayama, Ren Osugi, Takeshi Kaga Plot Keywords , Kazuyoshi Date Masato Sakai Kenji Kudo Ryo Nishikido Asuka Miyagi Anne Watanabe Saeko Katagiri Ryo Junnosuke Kurusu Hiroyuki Hirayama Kuniji Mikami Ren Osugi Masaaki Itsudu Takeshi Kaga