With him are two other worthy Toyotomi Hideyoshi , Ieyasu 's mentor , and the great 12th-century warrior Minamoto no Yoritomo , who founded the Kamakura shogunate and whom Ieyasu claimed as an ancestor .
Minamoto no Yoritomo , legendary warrior and founder of the Kamakura shogunate , was whom Ieyasu claimed to be a descendant of .