First, "Tushy" could be a nickname, but more likely, it's a misspelling of "Toshiko," as in Toshiko Akiyoshi, the famous Japanese jazz pianist and composer. She did collaborate with drummer and producer Michael Mantler, often credited as Toshiko Akiyoshi & Mundell Lowe, but not Mantler. Wait, no, Mantler was her long-time collaborator, yes. They worked together on several projects.