According to this theory, the Imperial Prince Atsuyoshi, a son of Emperor Uda, was exiled to Kojima in Bizen Province, and Takanori KOJIMA was a biological son of the 14th descendant of the prince called Bingo no kami Norinaga.
宇多天皇皇子・敦慶親王が備前児島に配流されたのち、その十四代目・備後守範長の実子が児島高徳という説。