Hideo Yokoyama

is a Japanese novelist who specializes in mystery novels. He is also known for his career as a journalist for the Jomo Shimbun, the regional paper in Gunma. He repeated his Kono Mystery ga Sugoi! No. 1 ranking in 2013 with Six Four (64). The English edition of Six Four, translated by Jonathan Lloyd-Davies, was shortlisted for the 2016 CWA International Dagger.

Works in English translation Novels Six Four (original title: 64 Rokuyon), trans. Jonathan Lloyd-Davies (riverrun, 2016) Seventeen (original title: Kuraimāzu hai [Climber's High]), trans. Louise Heal Kawai (riverrun, 2018) Prefecture D (original title: Kage no Kisetsu), trans. Jonathan Lloyd-Davies (riverrun, 2019) The North Light (original title: Nōsu Raito), trans. Louise Heal Kawai (riverrun, 2023)

Short story Motive (original title: Dōki), trans. Beth Cary (Ellery Queen's Mystery Magazine, May 2008)

Essay My Favourite Mystery, "Paradise lost in the box" by Kenji Takemoto (Mystery Writers of Japan, Inc. )

Awards and nominations Japanese Awards 1998 – Matsumoto Seicho Prize: "Kage no Kisetsu" (Season of Shadows) 2000 – Mystery Writers of Japan Award for Best Short Story: "Motive" 2003 – The Best Japanese Crime Fiction of the Year (Kono Mystery ga Sugoi! 2003): Han'ochi (Half a Confession) 2005 – Nominee for Honkaku Mystery Award for Best Fiction: Rinjō (Initial Response ) 2013 – The Best Japanese Crime Fiction of the Year (Kono Mystery ga Sugoi! 2013): Six Four

UK Award 2016 – Shortlisted for the CWA International Dagger: Six Four