Fujiwara no Yoshifusa (804 – October 7, 872), also known as Somedono no Daijin or Shirakawa-dono, is a Japanese statesman, courtier and politician during the Heian period.
When Yoshifusa's grandson is enthroned as Emperor Seiwa, Yoshifusa assumes the role of regent (sesshō) for the young monarch.
He is the first sesshō in Japanese history who is not himself of imperial rank; and he is the first of a series of regents from the Fujiwara clan.