Minamoto no Yoriie
Under heavy snow on the evening of "February 12, 1219 (Jōkyū 1, 26th day of the 1st month)", shōgun Minamoto no Sanetomo was coming down from Tsurugaoka Hachimangū's Senior Shrine after assisting to a ceremony celebrating his nomination to Udaijin. His nephew Kugyō, son of second shōgun Minamoto no Yoriie, came out from next to the stone stairway of the shrine, then suddenly attacked and assassinated him in the hope to become "shōgun" himself. The killer is often described as hiding behind the giant ginkgo, but no contemporary text mentions the tree, and this detail is likely an Edo-period invention first appeared in Tokugawa Mitsukuni's Shinpen Kamakurashi. For his act Kugyō was himself beheaded a few hours later, thus bringing the Seiwa Genji line of the Minamoto clan and their rule in Kamakura to a sudden end.