Keiji Mutoh, Japanese wrestler and actor
Keiji Muto (武藤 敬司, Mutō Keiji, born December 23, 1962) is a Japanese professional wrestler and professional wrestling executive currently signed to Pro Wrestling Noah (Noah), where he is a former GHC Heavyweight Champion. He is best known for his work as The Great Muta (ザ・グレート・ムタ, Za Gurēto Muta) in World Championship Wrestling (WCW) and New Japan Pro-Wrestling (NJPW) during the 1980s and 1990s, and from his runs in other American, Puerto Rican, and Mexican promotions. He was the president of All Japan Pro Wrestling (AJPW) from 2002 to 2013 and representative director of Wrestle-1 (W-1) from 2013 to 2020.

Considered one of the greatest wrestlers of all time, Muto is also one of the first Japanese wrestlers to gain an international fanbase. "The Great Muta" gimmick is one of the most influential in puroresu, emulated by many wrestlers, including Satoshi Kojima (as The Great Koji), Kazushi Miyamoto (as The Great Kazushi), Atsushi Onita (as The Great Nita), and Seiya Sanada (as The Great Sanada). Others copied or modified moves he popularized. He took part in what was generally considered to be one of the bloodiest professional wrestling matches at the time against Hiroshi Hase, leading to the creation of the "Muta scale", which rates the bloodiness of matches relative to this one's 1.0 value.Muto is one of the three wrestlers to win the three major championships of puroresu (AJPW's Triple Crown Heavyweight Championship, NJPW's IWGP Heavyweight Championship, and Noah's GHC Heavyweight Championship) after Kensuke Sasaki and Yoshihiro Takayama. He is the only of them to also win the NWA Worlds Heavyweight Championship, making him a nine-time world champion. He is a thirteen-time world tag team champion: five AJPW World Tag Team Championships, six IWGP Tag Team Championships, one GHC Tag Team Championship and one WCW World Tag Team Championship. In total, he has held 31 championships.

In 2013, Muto founded W-1, where he also wrestled semi-regularly. He made special appearances for the American promotion Total Nonstop Action Wrestling (TNA), as part of a TNA/W-1 talent exchange.