真島昌利 (Mashima Masatoshi) is a Japanese guitarist and songwriter most known for his role as a core member in punk rock bands THE BLUE HEARTS, ↑THE HIGH-LOWS↓and ザ・クロマニヨンズ (The Cro-Magnons). During the late eighties and early nineties Mashima was also an active solo artist, and released quite a few albums under his own name. Mashima was born in Tokyo on February 20, 1962 and usually wears a headband when appearing on stage and on promotional shots.