Masahiro Chono (蝶野 正洋, Chōno Masahiro), (born September 17, 1963) is an American-born Japanese professional wrestler. He primarily wrestled for New Japan Pro Wrestling (NJPW), but has also made appearances for World Championship Wrestling (WCW), 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.