- Please note that this is the Beelzebub Wiki's article on the location, if you are looking for the article on the chapter then you should head to Decapitation Island (chapter).
Decapitation Island (首切島 , Kubikiri-jima) is an island where Suiten Ikaruga, an old associate of Saotome, lives. Tatsumi Oga and Aoi Kunieda are sent there to train to fully use a demon's power. The island is also home to demons.