Seimei may refer to:

People

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  • Abe no Seimei (安倍 晴明, 921 A.D. – 1005), a Japanese onmyōji from the Heian period
  • Seimei Gamo (蒲生 晴明, born 1954), Japanese handball player

Fictional Characters

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  • Seimei Aoyagi (青柳 清明), a character from the manga series Loveless