Complex sentence: In the older Japanese documents, he was usually referred as Haitei (廃帝), the unthroned emperor and the posthumous name of Emperor Junnin was given by Emperor Meiji.
Split into simpler sentences: In the older Japanese documents, he was usually referred as Haitei (廃帝), the unthroned emperor. The posthumous name of Emperor Junnin was given by Emperor Meiji.