Yukito Ayatsuji

, known by his pen name , is a Japanese writer of mystery and horror. He is one of the founders of Honkaku Mystery Writers Club of Japan and one of the representative writers of the new traditionalist movement in Japanese mystery writing. His wife is Fuyumi Ono, a Japanese fantasy and horror writer who is known for her fantasy series The Twelve Kingdoms.

His first novel The Decagon House Murders was ranked as the No. 8 novel on the Top 100 Japanese Mystery Novels of All Time.

In 2018, a minor planet (2001 RG46) was named as Yukito Ayatsuji.

Translated works Another series Another, translated by Karen McGillicuddy (Yen Press, 2013) Another Episode S/0, translated by Karen McGillicuddy (Yen Press, 2016) Another 2001, translated by Nicole Wilder (Yen Press, 2022)

Bizarre House/Mansion Murders series The Decagon House Murders (original title: Jukkakukan no Satsujin), translated by Ho-Ling Wong (Locked Room International, 2015) Meurtres dans le decagone (The Decagon House Murders), French translation . The Mill House Murders (original title: Suishakan no Satsujin), translated by Ho-Ling Wong (Pushkin Vertigo, 2023) The Labyrinth House Murders (original title: Meirokan no Satsujin), translated by Ho-Ling Wong (Pushkin Vertigo, 2024) The Clock House Murders (original title: Tokeikan no Satsujin), translated by Ho-Ling Wong (Pushkin Vertigo, 2025 [UK]; 2026 [US]) The Black Cat House Murders (original title: Kuronekokan no Satsujin), translated by Ho-Ling Wong (Pushkin Vertigo, 2027)

Short story Heart of Darkness (original title: Kokoro no Yami), translated by Daniel Jackson (Speculative Japan 3: Silver Bullet and Other Tales of Japanese Science Fiction and Fantasy, Kurodahan Press, 2012)

Essay My Favourite Mystery, "Farewell, My Mask" by Akimitsu Takagi (Mystery Writers of Japan, Inc. )

Awards and nominations 1992 – Mystery Writers of Japan Award for Best Novel: Tokeikan no Satsujin (Clock Mansion Murders) 2005 – Nominee for Honkaku Mystery Award for Best Fiction: Ankokukan no Satsujin (Dark Mansion Murders) 2010 – Nominee for Honkaku Mystery Award for Best Fiction: Another