Ultimate!! Pervert Mask(究極!!変態仮面Kyūkyoku!! Hentai Kamen) is a comedy manga series originally run in the shōnen anthology magazine Weekly Shōnen Jump between 1992 and 1993 created by Keishuu Ando. Running for 52 chapters, it tells the tale of a young martial artist who transforms into a bizarre hero of justice by wearing a pair of panties on his head. The series returned by way of School Rumble author Jin Kobayashi with the special one-shot Kaettekita Hentai Kamen(帰ってきた変態仮面) in the magazine Jump Square in 2008.