Honkaku Mystery Writers Club of Japan (本格ミステリ作家クラブ, Honkaku Misuteri Sakka Kurabu) is a Japan-based organization for mystery writers who write honkaku (i.e. authentic, orthodox) mystery.
The organization was founded on 3 November 2000 by Yukito Ayatsuji, Natsuhiko Kyogoku, Hiroko Minagawa, Kaoru Kitamura, Tetsuya Ayukawa and other mystery writers. It is currently chaired by Rintaro Norizuki and claims about 170 members.
It presents the Honkaku Mystery Awards to writers every year and produces the annual anthology.