Nisio Isin

Nisio Isin (Japanese: 西尾 維新, Hepburn: Nishio Ishin, born 1981), stylized as NISIOISIN to emphasize the palindrome, is a pseudonymous Japanese novelist, manga author, and screenplay writer.

Nisio debuted in 2002 with the novel The Beheading Cycle (the first in his Zaregoto series), which earned him the 23rd Mephisto Prize at twenty years of age. In 2005, he began his long-running Monogatari novel series, which was published in 29 volumes as of 2023, and was later adapted as a highly-successful animated series of the same name, produced by Shaft. His Katanagatari novels, Medaka Box manga series, Jūni Taisen novel, and The Beheading Cycle have also been adapted as anime. He has also collaborated with Death Note writer Tsugumi Ohba and illustrator Takeshi Obata to write the light novel Death Note Another Note: The Los Angeles BB Murder Cases. Between 2009 and 2016, he ranked among the top 10 best-selling authors in Japan, ranking as the best-selling in 2012 and 2014. As of November 2022, his novels and manga had over 36 million copies in circulation.

Nisio's works frequently feature lengthy and witty dialogues. He is viewed as an author that blends regular novels and light novels, going through the genres of mystery, sekaikei, and shindenki, with frequent references to other manga and anime.