# The Devotion of Suspect X
**The Devotion of Suspect X** (容疑者Xの献身, *Yōgisha X no Kenshin*) is a 2005 crime novel by the Japanese author [Keigo Higashino](https://www.edgepedia.org/keigo-higashino), in which a mathematician covers up a murder committed by the woman he secretly loves, and his former university friend, a physicist, is drawn into the police investigation. It was published by Bungeishunju on 29 August 2005 and sold more than two million copies in Japan, where reviewers described it as a "national obsession".[1](https://books.bunshun.jp/ud/book/num/9784163238609?modal=buy) • [2](https://www.the-independent.com/arts-entertainment/books/reviews/the-devotion-of-suspect-x-by-keigo-higashino-2329005.html)
| Key fact | Detail |
|---|---|
| Original publication | Bungeishunju, 29 August 2005; 360-page hardcover, ISBN 978-4-16-323860-9[1](https://books.bunshun.jp/ud/book/num/9784163238609?modal=buy) |
| Serialization | First appeared in *All Yomimono* from June 2003 to January 2005 under the title 容疑者X, retitled for book publication[3](https://prizesworld.com/naoki/jugun/jugun134HK.htm) |
| Awards | 134th Naoki Prize (2006) and 6th Honkaku Mystery Grand Prize; first place in the 2005 Shukan Bunshun Mystery Best 10, *Kono Mystery ga Sugoi!*, and Honkaku Mystery Best 10 rankings; Edgar Award nominee in 2012[4](https://www.japansociety.org.uk/usercontent/73f0bfdc9b2fc9a6bf270581714afca1.pdf) • [1](https://books.bunshun.jp/ud/book/num/9784163238609?modal=buy) |
| Sales | More than two million copies sold in Japan[2](https://www.the-independent.com/arts-entertainment/books/reviews/the-devotion-of-suspect-x-by-keigo-higashino-2329005.html) |
| English edition | Translated by Alexander O. Smith with Elye J. Alexander; Minotaur Books, February 2011; 298 pages[5](https://www.complete-review.com/reviews/japannew/higashk2.htm) |
| Main characters | Ishigami, a high school mathematics teacher; Yasuko Hanaoka, his neighbor; Inspector Kusanagi; Professor Manabu Yukawa, a physicist[6](https://www.kirkusreviews.com/book-reviews/keigo-higashino/devotion-suspect-x/) |
| Screen adaptations | Japanese film *Suspect X* (2008), Korean film (2012), Chinese film directed by Alec Su (2017)[5](https://www.complete-review.com/reviews/japannew/higashk2.htm) • [7](https://asianfilmstrike.com/2017/07/09/the-devotion-of-suspect-x-2017-review/) |
## Plot
The novel opens with the killing. Yasuko Hanaoka, a single mother working at a Tokyo bento shop, has escaped her abusive ex-husband Togashi, but he tracks her down and appears at her apartment. When he attacks her teenage daughter Misato, Yasuko strangles him with an electrical cord.[8](https://www.independent.co.uk/arts-entertainment/books/reviews/the-devotion-of-suspect-x-by-keigo-higashino-2345431.html) • [6](https://www.kirkusreviews.com/book-reviews/keigo-higashino/devotion-suspect-x/)
The neighbor who then knocks at the door is Ishigami, a mathematical genius working as an uninspiring high school teacher. He has long harbored a silent devotion to Yasuko, whom he sees each morning on his way to work. He instantly understands what has happened, offers to help, and takes charge of the cover-up on the condition that mother and daughter place themselves entirely in his care. "Trust me," he tells them. "Logical thinking will get us through this."[8](https://www.independent.co.uk/arts-entertainment/books/reviews/the-devotion-of-suspect-x-by-keigo-higashino-2345431.html) • [2](https://www.the-independent.com/arts-entertainment/books/reviews/the-devotion-of-suspect-x-by-keigo-higashino-2329005.html)
The body is found dumped in a factory district, and the investigation is led by Inspector Kusanagi with help from Professor Manabu Yukawa, a physicist who consults for the police. Yukawa happens to know Ishigami from their university days, which places him in a position to read his old friend's mind. The result is an extended battle of wits between the two men, which one reviewer summarized as "I know that you know that I know what you know".[2](https://www.the-independent.com/arts-entertainment/books/reviews/the-devotion-of-suspect-x-by-keigo-higashino-2329005.html) • [6](https://www.kirkusreviews.com/book-reviews/keigo-higashino/devotion-suspect-x/)
The book departs from the conventional detective-story template by revealing the killer early. The suspense concerns not who committed the murder but how the cover-up was constructed and what it cost, and the final pages turn the entire scheme on its head with a twist that reviewers found both chilling and moving.[7](https://asianfilmstrike.com/2017/07/09/the-devotion-of-suspect-x-2017-review/) • [2](https://www.the-independent.com/arts-entertainment/books/reviews/the-devotion-of-suspect-x-by-keigo-higashino-2329005.html) A recurring question frames the plot: which is harder, devising an unsolvable problem or solving that problem?[9](https://saturdaysinabook.com/blog/2026/08/14/the-devotion-of-suspect-x/)
## Publication and awards
The novel was serialized in the magazine *All Yomimono* under the title 容疑者X from June 2003 through January 2005, with a final installment in August 2004 to January 2005, and was retitled for its book publication by Bungeishunju in August 2005.[3](https://prizesworld.com/naoki/jugun/jugun134HK.htm) In 2006 it won the 134th [Naoki Prize](https://www.edgepedia.org/naoki-prize), one of Japan's major literary awards, and the 6th Honkaku Mystery Grand Prize.[4](https://www.japansociety.org.uk/usercontent/73f0bfdc9b2fc9a6bf270581714afca1.pdf) The publisher's account records that it also took first place in the 2005 Shukan Bunshun Mystery Best 10, *Kono Mystery ga Sugoi!*, and the Honkaku Mystery Best 10 rankings, and was an Edgar Award nominee in 2012.[1](https://books.bunshun.jp/ud/book/num/9784163238609?modal=buy) Higashino himself called it a work that would rank in his personal top five.[1](https://books.bunshun.jp/ud/book/num/9784163238609?modal=buy)
The English translation by Alexander O. Smith, with Elye J. Alexander, was published by Minotaur Books in February 2011 in a 298-page edition.[5](https://www.complete-review.com/reviews/japannew/higashk2.htm) [Kirkus Reviews](https://www.edgepedia.org/kirkus-reviews) described it as a character-driven mystery with "a droll Columbo-like sleuth and a great surprise ending".[6](https://www.kirkusreviews.com/book-reviews/keigo-higashino/devotion-suspect-x/) Barry Forshaw, writing in *The Independent*, praised the "beautifully judged prose" and the book's detailed picture of life in modern Japan, including a postmodern take on the conventions of the detective novel.[8](https://www.independent.co.uk/arts-entertainment/books/reviews/the-devotion-of-suspect-x-by-keigo-higashino-2345431.html) James Kidd, reviewing for the *Independent on Sunday*, concluded that the book is not simply a thriller but a strange love story.[2](https://www.the-independent.com/arts-entertainment/books/reviews/the-devotion-of-suspect-x-by-keigo-higashino-2329005.html)
## Adaptations
The novel has been adapted for the screen three times. A Japanese film, *Suspect X*, directed by Nishitani Hiroshi, appeared in 2008; a Korean adaptation followed in 2012, directed by Bang Eun-jin; and a Chinese version, *The Devotion of Suspect X* (嫌疑人X的献身), directed by Alec Su, was released in March 2017, with Zhang Luyi as the mathematician Shi Hong, Ruby Lin as Chen Jing, and [Wang Kai](https://www.edgepedia.org/wang-kai) as the physicist Tang Chuan.[5](https://www.complete-review.com/reviews/japannew/higashk2.htm) • [7](https://asianfilmstrike.com/2017/07/09/the-devotion-of-suspect-x-2017-review/) • [10](https://www.cinemaescapist.com/2017/04/review-devotion-suspect-x-china-2017/) The 2017 Chinese film grossed $686.4 thousand in the United States and holds a 66 percent rating on the Rotten Tomatoes Tomatometer.[11](https://www.rottentomatoes.com/m/the_devotion_of_suspect_x) An American adaptation was reported as planned, and a Japanese web-series adaptation was also announced.[7](https://asianfilmstrike.com/2017/07/09/the-devotion-of-suspect-x-2017-review/) • [12](https://journals.du.ac.in/humsoc/pdf/full.pdf) The story has also been staged in Japan as a play and a reading drama.[13](https://www.hanmoto.com/bd/isbn/978-4-16-711012-3)
## Place in Higashino's work
The book is the work most identified with Higashino's Detective Galileo series, whose protagonist is the physicist Yukawa, and it introduced many English-language readers to Japanese crime fiction. A 2026 poll run by Bungeishunju to mark the author's fortieth anniversary, asking readers to choose from 104 of his books, placed it first by a wide margin.[13](https://www.hanmoto.com/bd/isbn/978-4-16-711012-3) Its success shaped the reception of his later translated novels: *Salvation of a Saint* (2012) was marketed as its follow-up, and reviewers of later Galileo books such as *Midsummer's Equation* and *Silent Parade* frequently measured them against it.[14](https://www.thenationalnews.com/arts-culture/books/higashino-s-follow-up-novel-to-suspect-x-pales-in-comparison-1.330281) Higashino, born in Osaka in 1958, died in 2026 at the age of 68.[1](https://books.bunshun.jp/ud/book/num/9784163238609?modal=buy) • [15](https://ndlsearch.ndl.go.jp/books/R100000002-I000009433304)
## References
1. [『容疑者Xの献身』東野圭吾 | 単行本, Bungeishunju](https://books.bunshun.jp/ud/book/num/9784163238609?modal=buy)
2. [James Kidd, "The Devotion of Suspect X, By Keigo Higashino", Independent on Sunday / The Independent, 30 July 2011](https://www.the-independent.com/arts-entertainment/books/reviews/the-devotion-of-suspect-x-by-keigo-higashino-2329005.html)
3. [直木賞のすべて：第134回 直木三十五賞 東野圭吾](https://prizesworld.com/naoki/jugun/jugun134HK.htm)
4. [Michael Sullivan, review of The Devotion of Suspect X, Japan Society](https://www.japansociety.org.uk/usercontent/73f0bfdc9b2fc9a6bf270581714afca1.pdf)
5. [The Devotion of Suspect X – Higashino Keigo, the complete review](https://www.complete-review.com/reviews/japannew/higashk2.htm)
6. [THE DEVOTION OF SUSPECT X, Kirkus Reviews, 1 December 2010](https://www.kirkusreviews.com/book-reviews/keigo-higashino/devotion-suspect-x/)
7. [THE DEVOTION OF SUSPECT X (2017) review, Asian Film Strike](https://asianfilmstrike.com/2017/07/09/the-devotion-of-suspect-x-2017-review/)
8. [Barry Forshaw, "The Devotion of Suspect X, By Keigo Higashino", The Independent, 29 August 2011](https://www.independent.co.uk/arts-entertainment/books/reviews/the-devotion-of-suspect-x-by-keigo-higashino-2345431.html)
9. [Review: The Devotion of Suspect X, Saturdays in a Book](https://saturdaysinabook.com/blog/2026/08/14/the-devotion-of-suspect-x/)
10. [Richard Yu, "Review: The Devotion of Suspect X (China, 2017)", Cinema Escapist](https://www.cinemaescapist.com/2017/04/review-devotion-suspect-x-china-2017/)
11. [The Devotion of Suspect X, Rotten Tomatoes](https://www.rottentomatoes.com/m/the_devotion_of_suspect_x)
12. [Khaled Hosseini, Keigo Higashino, and Zoe Ferraris, University of Delhi journal](https://journals.du.ac.in/humsoc/pdf/full.pdf)
13. [容疑者Xの献身 東野圭吾(著), 版元ドットコム / Bungeishunju bunko edition](https://www.hanmoto.com/bd/isbn/978-4-16-711012-3)
14. [Higashino's follow-up novel to Suspect X pales in comparison, The National](https://www.thenationalnews.com/arts-culture/books/higashino-s-follow-up-novel-to-suspect-x-pales-in-comparison-1.330281)
15. [容疑者Xの献身 (文春文庫), NDL Search, National Diet Library](https://ndlsearch.ndl.go.jp/books/R100000002-I000009433304)
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*Topic: Encyclopedia › Arts and culture › Literature and written works › Creative written works and worlds › Prose fiction › Standalone novels › Crime, mystery, thriller, and suspense standalone novels › Classic detective and whodunit novels*
*Initially written Sep 17, 2026 · Reviewed: Sep 18, 2026; Oct 25, 2026 · Edited: Sep 18, 2026; Oct 25, 2026 · Last review: Oct 25, 2026*
*Copyright 2026 EdgeChat AI, a subsidiary of Biostate AI.*
License: Edgepedia Community License 1.0, https://www.edgepedia.org/edgepedia/license