Kazutoki Umezu was born 1949 in Sendai, Miyagi prefecture. He started to play Jazz when he was a student of Kunitachi Music University. In the 1970s, he formed a band called "Seikatsu Kōjyō Iinkai" with pianist Yoriyuki Harada. With their humorous playing and creative costumes, they were popular in Japan and put free jazz on mainstream media like NHK. Besides jazz, Umezu also plays enka, pop, progressive rock, punk and so forth. Throughout decades of his music career, he has collaborated with numerous famous artists, including B.B. King, Sunny Murray, David Murray, William Parker, Barre Phillips, Peter Brötzmann, John Zorn, George Lewis，Marc Ribot, Yosuke Yamashita, Otomo Yoshihide, Akira Sakata, Yoshida Tatsuya, Mikami Kan and many more.