Since he had murdered another member of his own clan, he was dishonored and forced to choose between suicide or exile to another country. He chose the latter, and Yoshi and the now-recovered Shen fled Japan with their pet rat Splinter, ending up in the United States—specifically, New York City. Years later, Nagi's brother Oroku Saki climbed the ranks of the Foot to become assigned the leader of its New York branch. He followed the two lovers to New York City. There, Yoshi and Shen lived until Nagi's younger brother Oroku Saki arrived to kill them both in revenge. However, the rat Splinter escaped to the sewers and mutated along with the turtles. He then proceeded to teach ninjutsu to the Turtles as he himself had learned it from mimicry of Yoshi, in order to have them avenge his owner's de