Hōjō Tokimasa
The Tanegashima clan claims Taira ancestry. According to the family genealogy, its founder Nobumoto (信基) was a great-grandson of Taira no Kiyomori. Surviving the Genpei War (1180–1185), he was adopted by Hōjō Tokimasa, changed his name to Tokinobu (時信) and was given the island of Tanegashima at the beginning of the Kamakura period. However, this story is considered unhistorical because no contemporary source supports it.