Hantei XXX in the year 879 commissioned a sword for his son from a Crane swordsmith. The Crane had a ronin apprentice named Tsi who was allowed to create the saya for the blade. The Emperor was so taken with the beauty of their creation that he made the Crane his personal smith and granted Tsi the right to a family name. The historians of the court recalled that Tsi was a family name granted to ronin in the time of Hantei Genji. The Emperor proclaimed the Tsi a vassal family of the Hantei, and they would only serve the Emperor.