Dobu Island is an island, part of D'Entrecasteaux Islands in Papua New Guinea. It is located south of Fergusson Island and north of Normanby Island. It is currently administered by Dobu Rural LLG. The people of Dobu were the subject of a seminal anthropological study by Reo Fortune. He described the Dobuan character as "paranoid", obsessed with black …Dobu Island is an island, part of D'Entrecasteaux Islands in Papua New Guinea. It is located south of Fergusson Island and north of Normanby Island. It is currently administered by Dobu Rural LLG. The people of Dobu were the subject of a seminal anthropological study by Reo Fortune. He described the Dobuan character as "paranoid", obsessed with black magic, and as having extremely unusual attitudes toward sex and violence.