Katsuya Kumagai does not appear within the "Higurashi no Naku Koro ni Kai: Ura☆Higu" content. Ura☆Higu presents humorous extras unrelated to the main plot, featuring parodic skits including Rena advising Ōishi about insurance, Rena attempting to prevent her skirt from flying up, Rika grabbing Mion's breasts, and repeated gags involving Takano standing on Tomitake. These segments do not include Kumagai or any police-related characters. Official character listings for Ura☆Higu also omit Kumagai, focusing solely on primary and secondary characters like Keiichi, Rena, Rika, Satoko, and Hanyuu.