Nightmare Inspector: Yumekui Kenbun(夢喰見聞) is a Japanese shōnen manga series created by Shin Mashiba. It first premiered in Monthly Stencile, a shōjo magazine, in December 2001 and was then serialized in Monthly GFantasy from 2003 to 2007. Nine volumes have been released in Japan by Square-Enix since 2007, ending the series. The manga has been licensed in North America by Viz Media, with all nine volumes released; the first being released on April 8, 2008. The series is set during the end of the Taisho Era in Japan.