text: According to Nihon Shoki , he was the fourth son of Emperor Å jin and the father of Emperors RichÅ `` , Hanzei , and IngyÅ .
simplified: According to Nihon Shoki , Nintoku was the fourth son of Emperor Å jin and the father of three emperors â '' RichÅ `` , Hanzei , and IngyÅ .