Emperor Seiwa
Minamoto no Yoritomo (1147–1199), the first shōgun of the Kamakura shogunate, and a descendant of Emperor Seiwa (858–876), the 56th Emperor of Japan. He, the Minamonto (Genji) clan and patrilineal descendants of the Imperial family of Japan should belong to the same Y-DNA haplogroup D1a2a1a2b1a1 (D-Z1504, CTS8093).