Hamato Yoshi is a fictional character from the Teenage Mutant Ninja Turtles fictional universe. In all continuities, he was once a great and honourable ninja whose story is always closely intertwined with that of Splinter: he was the owner of a pet rat who becomes Splinter in the original comics, films and the 2003 cartoon series while Splinter was Hamato Yoshi in the 1987 cartoon series, the Adventures comics, and the 2012 cartoon series.