Minamoto no Sanetomo

was the third shōgun of the Kamakura shogunate. He was the second son of the Kamakura shogunate founder, Minamoto no Yoritomo. His mother was Hōjō Masako and his older brother was the second Kamakura shogun Minamoto no Yoriie. His childhood name was . He was the last head of the Minamoto clan of Japan. His Dharma name was . He was an accomplished waka poet. Early life