is a Japanese professional wrestler. , he is signed to All Elite Wrestling (AEW), where he is a member of the Don Callis Family stable and is the current AEW International Champion in his second reign. He is also a former AEW World Trios Champion (with Kyle Fletcher and Mark Davis). He is also a former one-time AEW Continental Champion, holding the record for the longest reign in the title's history and the longest for any AEW championship at 647 days. He was also the inaugural and only AEW Unified Champion when he simultaneously held the Continental and International titles together.

Okada is best known for his 18-year original tenure in New Japan Pro-Wrestling (NJPW), where he was a seven-time IWGP Heavyweight Champion, with his fourth reign being the longest in the company's history at 720 days. He also holds the record for most successful title defenses with 12 and the most defenses as the champion with 36.

Initially trained by Último Dragón and making his debut in August 2004, Okada spent his first years in professional wrestling working in Mexico before returning to Japan and making NJPW his home promotion in mid-2007. Originally working as a junior heavyweight, Okada graduated to the heavyweight division in April 2008 with limited success. In February 2010, NJPW sent Okada on a learning excursion to American promotion Total Nonstop Action Wrestling (TNA) where he spent the next 20 months, mainly performing on the promotion's secondary television program, Xplosion. From January to March 2011, he performed under the name Okato on TNA's primary television program, Impact!, as Samoa Joe's sidekick in his rivalry with D'Angelo Dinero.

Okada's run with TNA ended in October 2011 and he returned to NJPW in January 2012, repackaged as the , complete with a new look and a villainous persona. Just a month later, Okada defeated Hiroshi Tanahashi to win NJPW's top title, the IWGP Heavyweight Championship, which he would hold for four months before losing it back to Tanahashi. The following August, Okada won NJPW's premier tournament, the G1 Climax. At the end of the year, Tokyo Sports magazine named Okada the 2012 MVP in all of Japanese professional wrestling. The following year, Okada first won the New Japan Cup in March and then regained the IWGP Heavyweight Championship from Tanahashi in April. After a 13-month reign, Okada lost the title in May 2014. Three months later, he won his second G1 Climax. Okada went on to win his third G1 Climax in 2021 and his fourth in 2022, which makes him the wrestler with the second-most wins in the tournament with four, just behind Masahiro Chono with five. Okada won the IWGP Heavyweight Championship three more times and headlined NJPW's biggest annual event—Wrestle Kingdom—nine times (7, 9, 10, 11, 12, 14, 16, 17 and 20). Okada left NJPW in March 2024, immediately signing with AEW.

Considered as one of the greatest professional wrestlers of all time, he became the first Japanese wrestler to top Pro Wrestling Illustrateds list of the top 500 wrestlers in the world in 2017. Readers of the Wrestling Observer Newsletter named him as the most outstanding wrestler of the 2010s in March 2020. Okada's match with Kenny Omega at Dominion 6.9 in Osaka-jo Hall in June 2018 is regarded as one of the greatest professional wrestling matches of all time, and received a rating of seven stars by journalist Dave Meltzer, the highest rating Meltzer has ever awarded a wrestling match. Okada was inducted into the Wrestling Observer Newsletter Hall of Fame in 2021 (his first year of eligibility).

Early life Okada was born on November 8, 1987, in Anjō, Aichi. As a child, he lived and attended a primary school in Anjō. However, before completing primary school, Okada was lured by the nature in his mother's hometown in the Gotō Islands in Nagasaki Prefecture and chose to complete the rest of his primary education in a special boarding school there. Upon graduation, he returned to Anjō.

In middle school, Okada joined the school's baseball and track team. Although he did not stand out as a baseball player, Okada was able to win first place in a regional 100 meter dash competition. His reputation as a sprinter was good enough to be scouted by high school recruiters. He was exposed to professional wrestling for the first time when one of his older brothers happened to borrow a New Japan Pro-Wrestling (NJPW) video game from his friend.

Professional wrestling career

Training and early career (2004–2007) Trained by Último Dragón at his Toryumon professional wrestling school, Okada made his debut on August 29, 2004, losing to Negro Navarro and would spend the next couple of years wrestling primarily in Toryumon Mexico. In December 2005, Okada won the 2005 Young Dragons Cup. Okada would also make appearances in the United States and Canada for promotions such as UWA Hardcore Wrestling and Chikara.

On October 27, 2006, Okada participated in UWA Hardcore Wrestling's 2006 Grand Prix Tournament, but was eliminated in the first round by Puma. The following day, Okada and Último Dragón unsuccessfully challenged Alex Shelley and Chris Sabin for the NWA International Lightweight Tag Team Championship. On November 12, 2006, Okada made his debut for Chikara by defeating Osiris.

During his time in UWA Hardcore Wrestling, Okada also unsuccessfully challenged Josh Prohibition for the UWA Canadian Championship on May 26, 2007. On July 22, 2007, Okada took part in Último Dragón's 20th anniversary show, where he wrestled in a six-man tag team match alongside NJPW wrestlers Jyushin Thunder Liger and Milano Collection A.T. After the match, it was announced that Okada was graduating from Toryumon and joining NJPW.

New Japan Pro-Wrestling (2007–2024)

Young Lion (2007–2010) Upon joining NJPW, Okada entered the NJPW Dojo, where he went through further training. He would have a pre-debut match for the company on August 26, 2007, losing to Tetsuya Naito. A legitimate injury would sideline Okada for the next eight months and upon his return in April 2008 he would be billed as a heavyweight instead of a junior heavyweight, and have his official debut match on April 12, 2008, against Taichi Ishikari. His career would start to pick up steam the following year with breakout performances in the NJPW vs. Pro Wrestling Noah war against the likes of Takashi Sugiura and Go Shiozaki. He would also wrestle main eventers such as Shinsuke Nakamura, Hirooki Goto and Tajiri and—despite losing all of his big matches—he was becoming a big crowd favorite. In January 2010, NJPW announced that they would be sending Okada to Total Nonstop Action Wrestling (TNA) for a developmental tour in order for him to become the wrestler NJPW believed he could be. NJPW president Naoki Sugabayashi predicted the tour could take up to two or three years. On January 31, 2010, Okada was defeated by former four-time IWGP Heavyweight Champion Hiroshi Tanahashi in his NJPW farewell match.

Return from excursion (2011–2012) On December 14, 2010, NJPW announced that Okada would be returning to the promotion on January 4, 2011, at Wrestle Kingdom V in Tokyo Dome, where he would team with Hirooki Goto against Noah representatives Takashi Sugiura and Yoshihiro Takayama. On December 23, he made a surprise return to the promotion, performing a German suplex on Takayama, after a match where he and Minoru Suzuki had defeated Yuji Nagata and Wataru Inoue. At Wrestle Kingdom V in Tokyo Dome, Takayama pinned Okada to win the match. After the event, Okada returned to the United States and TNA. Okada returned to NJPW during the NJPW Invasion Tour 2011 (NJPW's first tour of the United States) on May 13 in Rahway, New Jersey, but was defeated by MVP in the first round of a tournament to determine the inaugural IWGP Intercontinental Champion. At the following day's event in New York City, Okada teamed with Ryusuke Taguchi and Togi Makabe in a six-man tag team match, where they were defeated by Davey Richards, Homicide and Rhino. On May 15, during the final day of the tour in Philadelphia, Pennsylvania, Okada teamed with Charlie Haas, Josh Daniels and Tiger Mask in an eight-man tag team match, where they were defeated by Chaos (Shinsuke Nakamura, Gedo, Jado and Yujiro Takahashi). On December 9, 2011, NJPW announced that Okada, having gained of muscle to increase his overall weight from to , would be returning to the promotion on January 4, 2012, at Wrestle Kingdom VI in Tokyo Dome, where he would face Yoshi-Hashi, also making his return after a learning excursion to Consejo Mundial de Lucha Libre (CMLL).

Feud with Hiroshi Tanahashi (2012–2016)

On January 4, 2012, Okada defeated Yoshi-Hashi in his return match and then challenged Hiroshi Tanahashi to a match for the IWGP Heavyweight Championship following the show's main event. At the following day's press conference, where the title match was made official, Okada revealed that he had joined Chaos, NJPW's top villainous stable, enlisting new stablemate Gedo as his manager and spokesperson. Adopting the new villainous persona of "Rainmaker", Okada changed the Japanese writing of his ring name from "岡田かずちか" to "オカダ・カズチカ". Okada described his new persona as a combination of the three professional wrestling styles he had learned, stating that he took his dropkick from Mexico, his "fighting spirit" from Japan and the "TV and the entertainment" from the United States.

In the month leading to the title match, Okada went on a main event win streak, which included pinning Tanahashi in a tag team match on January 29. On February 12 at The New Beginning, Okada defeated Tanahashi to win the IWGP Heavyweight Championship for the first time. Okada made his first title defense on March 4, defeating Tetsuya Naito in the main event of NJPW's 40th anniversary event. On May 3 at Wrestling Dontaku 2012, Okada defeated 2012 New Japan Cup winner and reigning IWGP Intercontinental Champion Hirooki Goto to make his second successful title defense. On June 16 at Dominion 6.16, Okada lost the IWGP Heavyweight Championship back to Hiroshi Tanahashi, ending his reign at 125 days.