Riku Onda, born in 1964, is the professional name of Nanae Kumagai. She has been writing fiction since 1991 and has won the Yoshikawa Eiji Prize for New Writers, the Japan Booksellers' Award, the Mystery Writers of Japan Award for Best Novel, the Yamamoto Shugoro Prize, and the Naoki Prize. Her work has been adapted for film and television. Alison Watts is an Australian-born Japanese to English translator and long time resident of Japan. She has published a translation of Aya Goda's TAO: On the Road and On the Run In Outlaw China and of Sweet Bean Paste by Durian Sukegawa, released in October 2017.
"A superb mystery in the true sense of the word." Asahi Shimbun "This spine-chilling masterpiece will make you aware of the dark places in your own heart." Hokkaido Shimbun "With superb skill, Onda depicts the ambiguity of truth and the unreliability of facts." Shukan Pia