In the answer to this letter was written '東天皇敬白西皇帝' (The east Emperor answers to the west Emperor), which shows that 'the King of Wa' written by the Sui Dynasty was changed to 'the Emperor.'
これに対する返書には「東天皇敬白西皇帝」（「東の天皇西の皇帝に敬まひて白す）とあり、隋が「倭皇」とした箇所を「天皇」としている。