Tadayuki HIROHATA is the 3rd Prince of Imperial Prince Hachijonomiya Toshihito (the grandson of the 106th Emperor Ogimachi), and he established Hirohata family under the name of the Minamoto Clan (the official name was Ogimachi-Genji).
第106代正親町天皇の孫の八条宮智仁親王の第3王子で源氏（正親町源氏）を称し広幡家を興した広幡忠幸