Honkaku Mystery Writers Club of Japan

 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.
Honkaku mystery.
"Honkaku" (i.e. authentic, orthodox) mystery is one of subgenres of mystery fiction that focuses on "fair play". Mystery novels written during the "Golden Age" of the mystery novel (e.g., the Ellery Queen novels) are regarded as examples of honkaku mystery.
Anthologies.
The HMC started producing the annual anthology in 2001.