Given the question: Shigurui - Shigurui ( lit. "Death Frenzy") is a manga series written by Norio Nanjo and illustrated by Takayuki Yamaguchi based on the first chapter of the novel Suruga-jo Gozen Jiai by Norio Nanjo.An animated television adaptation based on the first 32 chapters (or the initial six and a half volumes) of the manga aired on WOWOW July 19th 2007 to October 12th 2007. The series was directed by Hiroshi Hamasaki written by Seishi Minakami and produced by Madhouse Studios. Given a choice of categories company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, the text refers to which one?
The answer is:
Written Work