Antonio Inoki (アントニオ猪木, Antonio Inoki, born Kanji Inoki (Japanese: 猪木寛至, Hepburn: Inoki Kanji) and later Muhammad Hussain Inoki; February 20, 1943 – October 1, 2022) was a Japanese professional wrestler, professional wrestling trainer, martial artist, politician, and promoter of professional wrestling and mixed martial arts (MMA). He is best known as the founder and 33-year owner of New Japan Pro-Wrestling (NJPW). He is considered to be one of the most influential professional wrestlers of all time, and one of the biggest key influences on MMA in Japan and internationally.

After spending his adolescence in Brazil, Inoki began his professional wrestling career in the 1960s for the Japan Pro Wrestling Alliance (JWA) under the tutelage of Rikidōzan. After he changed his in-ring moniker to Antonio Inoki in 1963, a homage to accomplished Italian wrestler Antonino Rocca, Inoki became one of the most popular stars in Japanese professional wrestling. He is credited with developing strong style and shoot style wrestling in the 1970s and 1980s. He parlayed his wrestling career into becoming one of Japan's most recognizable athletes, a reputation bolstered by his 1976 fight against world champion boxer Muhammad Ali – a fight that served as a predecessor to modern day MMA. In 1995, with Ric Flair, Inoki headlined two shows in North Korea that drew 165,000 and 190,000 spectators, the highest attendances in professional wrestling history. Inoki wrestled his retirement match on April 4, 1998 against Don Frye, and was inducted into the WWE Hall of Fame in 2010. Inoki was a twelve-time professional wrestling world champion, notably being the inaugural IWGP Heavyweight Champion and the first Asian WWF Heavyweight Champion (and one of only four overall WWF/WWE Champions of Asian descent, the others being The Iron Sheik, Batista, and Jinder Mahal) – a reign not officially recognized by WWE.

Inoki began his promoting career in 1972, when he founded New Japan Pro-Wrestling. He remained the owner of NJPW until 2005 when he sold his controlling share in the promotion to the Yuke's video game company. In 2007, he founded the Inoki Genome Federation (IGF). In 2017, Inoki founded ISM and the following year left IGF. He was also a co-creator of the karate style Kansui-ryū (寛水流, Kansui-ryū) along with Matsubayashi-ryū master Yukio Mizutani.

In 1989, while still an active wrestler, Inoki entered politics as he was elected to the Japanese House of Councillors. During his first term with the House of Councillors, Inoki successfully negotiated with Saddam Hussein for the release of Japanese hostages before the outbreak of the Gulf War. His first tenure in the House of Councillors ended in 1995, but he was reelected in 2013. In 2019, Inoki retired from politics.