(without heart) Of renga, frivolous, that is, unconcerned with the classical ideal of beauty in appropriate subject matter and diction, but featuring humor and unconventional language. (Other meanings in other contexts.) See ushin.
Mushin is a character in the manga and anime series Inu Yasha. He is an elderly Buddhist monk (hÅshi; æ³•å¸«, ã»ã†ã—) who became Miroku's guardian when the Kazaana (Wind Tunnel) consumed Miroku's father.