Mifune's katana

The Kurosawa will honor the one own that sword. Sazanka vows to Tsubaki Kurogane that he will be owning that sword by honing his sword skill. In the battle between Sazanka and Tsubaki, She defeated him. That lead sazanka to go into wild, he killed his own comrades and for his act he has been exile from Land of iron .

Sazanka describes about lord Mifune using the Kurosawa in his childhood.