First, Takurei HIRAKO concluded that Emperor Keitai (Emperor Kinmei's father) died in 527 as written in Kojiki ("the Record of Ancient Matters"), and Emperor Ankan and Senka reigned as the Emperor for two years respectively.
まず、平子鐸嶺は父の継体天皇の没年を『古事記』の527年（丁未年4月9日）とし、その後2年ずつ安閑・宣化が在位したとした。