Koroshiya-san: The Hired Gun Details Casts Galleries Posters Season Lists Title Koroshiya-san: The Hired Gun Genres Animation Comedy Drama Mystery First Air Date 2013-10-10 Last Air Date 2013-12-12 Episode Runtime 00 Hours 03 Minutes Total Season(s) 1 Total Episode(s) on All Seasons 10 Runtime 3 Production Companies Opera House Keiji Fujiwara... ... Takahiro Sakurai... ... Toru Okawa... ... Saki Fujita... ... Aki Kanada... ... Original Size (1280x720) Original Size (1280x720) Original Size (500x750) Season 1 10 Episode(s) 2013-10-10