Ryūsui Seiryōin (清涼院 流水, Seiryōin Ryūsui, born August 9, 1974) is a Japanese novelist, active in mystery and various other fields. He was born in 1974, in Hyōgo Prefecture, Japan. He won the 2nd Mephisto Prize in 1996 while in Kyoto University, and started to work as a novelist. After that, Ryusui published over 60 novels. His works are always controversial.^[1] The JDC (Japan Detectives Club) series has inspired tribute novels by authors like Ōtarō Maijō and Nisio Isin.

In 2007, he achieved the publication of the series, "What a perfect world!", for 12 consecutive months. In the same year, he carried out "Doumo tour", the autograph sessions for 12 consecutive months held in Japanese major cities, and made a great success.

On May 1, 2009, he launched "bbbcircle", his official website, with Kai Chamberlain, a Canadian cartoonist.

His works defy not only the common wisdom of novels but general knowledge in the broad sense and give new values to readers. His mystery novels, particularly the JDC series, are known for genre-busting metatexual complexity.

• King In the Mirror: The Reflection of Michael Jackson (translated from Japanese by the author himself, The BBB: Breakthrough Bandwagon Books, 2012)^[2][3]

Seiryoin has been working as a translator from Japanese into English since 2012.

Short mystery stories

• Hiroshi Mori
  • "The Girl Who Was the Little Bird" (The BBB: Breakthrough Bandwagon Books, 2013)^[4]
  • "A Pair of Hearts" (The BBB: Breakthrough Bandwagon Books, 2014)^[5]
  • "I'm In Debt to Akiko" (The BBB: Breakthrough Bandwagon Books, 2014)^[6]
  • "Silent Prayer In Empty" (The BBB: Breakthrough Bandwagon Books, 2015)^[7]
  • "Kappa" (The BBB: Breakthrough Bandwagon Books, 2015)^[8]
• Kenichi Sobu
  • "The Hopeless Dream" (The BBB: Breakthrough Bandwagon Books, 2012)^[9]
  • "Your Melody" (The BBB: Breakthrough Bandwagon Books, 2014)^[10]

The Gifted series by Ryosuke Akizuki

• "The Gifted Vol.3: The Skydiving Club" (The BBB: Breakthrough Bandwagon Books, 2014)^[11]
• "The Gifted Vol.4: The Phantom of Gemini" (The BBB: Breakthrough Bandwagon Books, 2015)^[12]

Urban Legend Detectives Case series by Kyosuke Tsumiki

• "Urban Legend Detectives Case 1: The Merry's Mail" (The BBB: Breakthrough Bandwagon Books, 2013)^[13]
• "Urban Legend Detectives Case 2: Solitary Hide and Seek" (The BBB: Breakthrough Bandwagon Books, 2013)^[14]
• "Urban Legend Detectives Case 3: The Kunekune (Dancing White Shadow)" (The BBB: Breakthrough Bandwagon Books, 2014)^[15]

The Case Diary of Chinami Chiba series by Takafumi Takada

• "Three Little Bonzes: The Case Diary of Chinami Chiba" (The BBB: Breakthrough Bandwagon Books, 2014)^[16]
  • a mystery short story combined with the logic puzzle, Knights and Knaves
• "A Goat on a Boat to Float: The Case Diary of Chinami Chiba" (The BBB: Breakthrough Bandwagon Books, 2015)^[17]
  • a mystery short story combined with the river crossing puzzle

The Sky Crawlers series by Hiroshi Mori

• "The Sky Crawlers" (The BBB: Breakthrough Bandwagon Books, 2017)^[18]
• "None But Air" (The BBB: Breakthrough Bandwagon Books, 2018)^[19]
• "Down To Heaven" (The BBB: Breakthrough Bandwagon Books, 2019)^[20]
• "Flutter Into Life" (The BBB: Breakthrough Bandwagon Books, 2020)^[21]
• "Cradle the Sky" (The BBB: Breakthrough Bandwagon Books, 2021)^[22]
• "Sky Eclipse" (The BBB: Breakthrough Bandwagon Books, 2022)^[23]

S&M Series by Hiroshi Mori

• "The Perfect Insider" (The BBB: Breakthrough Bandwagon Books, 2023)^[24]

Interviews

• Becoming the Best Interviewer In the World: The BBB Interview Selection, interviewee: Yohei Hayakawa (The BBB: Breakthrough Bandwagon Books, 2013)^[25]
• Kaiten-sushi Saves the World: The BBB Interview Selection, interviewee: Nobuo Yonekawa (The BBB: Breakthrough Bandwagon Books, 2013)^[26]
• Mountaineering, Photographs, and World Heritage Sites: The BBB Interview Selection, interviewee: Hiroyuki Nakada (The BBB: Breakthrough Bandwagon Books, 2014)^[27]