Hideo Yokoyama (横山 秀夫, Yokoyama Hideo, born 1957) is a Japanese novelist.

Yokoyama specializes in mystery novels.

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.^[1]

He is known for his career as journalist for the Jomo Shimbun, the regional paper in Gunma.

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)

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. [1])

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 ^[2])
• 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^[1]