Ippon Tsuno no Youkai (一本角の妖怪) is a supporting character in Natsume Yuujinchou Go Tokubetsu-hen, voiced in Japanese by Hiroki Matsukawa. The series' music includes "Natsume Yujin-cho - Opening 1 | Issei no Sei", "茜さす/Akane Sasu - Aimer |「夏目友人帳 伍/Natsume Yuujinchou Go」ED | 漢字/Romanji/English Lyrics".