The Emperor Seiwa of Japan reference article from the English Wikipedia on 24-Apr-2004
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Emperor Seiwa of Japan

Time you got around to sponsoring a child
Emperor Seiwa (清和天皇) was the 56th imperial ruler of Japan. He is known as the ancestor of famous Seiwa Genji clan.

Lived: 850-881
Ruled: 858-876

Preceded by:
Montoku
Emperor of Japan Succeeded by:
Yozei