Masahiro Chono (蝶野 正洋, Chōno Masahiro?), (born September 17, 1963) is a Japanese professional wrestler. He primarily wrestles for New Japan Pro Wrestling (NJPW), but has also made appearances for the now defunct World Championship Wrestling, as a member of the New World Order. Chono was also known as Mister Black Jack when he first started as a villain. He is a former NWA World Champion and IWGP Heavyweight Champion. For those less familiar with wrestling, he has become well known for his appearances on the news year's specials of Downtown's Gaki no Tsukai No-Laughing batsu games. His ritual appearance always involves slapping Hōsei Yamasaki in the face.