Matsumoto Kōshirō
Like most Kabuki actors, Hakuō had a number of stage names ("gō") over the course of his career. A member of the Koraiya guild, he would often be called by that name, particularly in the practice of "yagō", in which an actor's guild name is shouted out as a cheer or encouragement during a performance. Originally appearing on stage as Matsumoto Sumizō II, he later took the names Ichikawa Somegorō V and Matsumoto Kōshirō VIII.