Minamoto no Sanetomo
In 1192, cloistered emperor Go-Shirakawa (who died later that year) bestowed upon Yoritomo the title of "shōgun". That same year, Masako and Yoritomo had another son, Minamoto no Sanetomo. Yoshitoki was now also in a very powerful position, especially after Yoritomo died in 1199. Masako became a nun, but was still involved in politics, while Yoshitoko prepared to be heir.