Emperor Seiwa
In 864 Yoshimi sent his daughter Tamiko as a bride to Emperor Seiwa. Yoshimi's older and more powerful brother Yoshifusa was cautious of his popularity and success. In the Ōtenmon Incident of 866, Yoshimi ordered Minamoto no Makoto's arrest based on the testimony of Tomo no Yoshio, but Yoshifusa protested Makoto's innocence and prevented it. After this, Yoshimi lost most of his political influence.