Task: Sentence Expansion
Input (English): In Japan , reigning emperors are known simply as " the Emperor " and he is now referred to primarily by his posthumous name , Emperor Sho ̄ wa ( 昭和天皇 ) .
Output (English): In Japan , reigning emperors are known simply as the Emperor and he is now referred to primarily by his posthumous name , Sho ̄ wa ( 昭和 ) , which is the name of the era coinciding with his reign ; for this reason , he is also known as the Sho ̄ wa Emperor or Emperor Sho ̄ wa .