Nisio Isin
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. The JDC (Japan Detectives Club) series has inspired tribute novels by authors like Ōtarō Maijō and Nisio Isin.