is a Japanese professional wrestler and former mixed martial artist, better known by his mononymous ring name Kushida (stylized as KUSHIDA). He is signed to New Japan Pro-Wrestling (NJPW), and also makes appearances for Major League Wrestling (MLW), where he is a member of Contra Unit.

He is best known for his tenures with NJPW, where he is a former six-time IWGP Junior Heavyweight Champion and a four-time IWGP Junior Heavyweight Tag Team Champion (twice with Time Splitters teammate Alex Shelley and twice with Kevin Knight). He was the winner of the 2015 and 2017 Best of the Super Juniors tournaments, the 2016 Super J-Cup, and the 2017 Pro Wrestling World Cup, a tournament co-promoted by NJPW with What Culture Pro Wrestling (WCPW) and Revolution Pro Wrestling (RevPro). Kushida previously made appearances for NJPW's American partner Ring of Honor (ROH), where he is a former ROH World Television Champion. In 2019, Kushida signed with WWE, who assigned him to perform on the 205 Live and NXT brands. In WWE, he is a former one-time NXT Cruiserweight Champion. In 2022, he departed from WWE and returned to NJPW; he signed with TNA (then known as Impact Wrestling) in December of that same year.

Kushida began training for a mixed martial arts (MMA) career at Nobuhiko Takada's Takada Dojo while in junior high school. He made his professional MMA debut in 2003 for the ZST promotion, winning the following year's ZST Genesis Lightweight Tournament. In 2005, he retired from MMA, ending his career with an undefeated record.

MMA and professional wrestling career Takada Dojo and ZST (2003–2005) Kushida joined Nobuhiko Takada's Takada Dojo during his junior high school years, where he started learning both pro wrestling and mixed martial arts (MMA) under Takumi Adachi.Wrestler Human Story 19: Kushida, Shukan Puroresu magazine, November 24, 2010 He had his MMA debut five years later for ZST, defeating Kenji Mizuno by disqualification after the latter grabbed the ropes to defend a takedown. Kushida followed his debut with a draw, a win, and a three-match tournament victory at the 2004 ZST Genesis Lightweight Tournament. Around the same time, he held a part-time job with the Tokyo Sports magazine and began attending Senshu University.

His performance in the tournament earned him offers from multiple MMA promotions, but he would turn them down instead choosing to embark on a professional wrestling career. Soon after his final MMA fight, Kushida was granted a one-year temporary absence from the Senshu University, during which he would travel to Mexico with money borrowed from his mother. In Mexico, he learned the style of lucha libre under Oriental in his Aztec Budokan wrestling school, where he had his professional debut on September 16, 2005, as the masked wrestler Yujiro. This Mexican endeavour is not acknowledged by many wrestling sites, which label his first match in Hustle as his professional wrestling debut.

Hustle (2006–2009) Kushida returned to Japan on February 10, 2006, and signed up with his trainer Takada's promotion Hustle after being scouted by Tajiri and Hiroshi Nagao. Tajiri eventually took Kushida under his wing. Kushida debuted as a pro wrestler on September 7, 2006, with Tajiri to take on Red Onigumo and Blue Onigumo. Kushida quickly earned the title "Hustle Supernova" and became one of the top up-and-comers of the babyface faction Hustle Army, forming a team with Tajiri and fellow apprentice Banzai Chie. Kushida and Chie, assisted by guest tarento Hitomi Kaikawa, entered a feud with villainous Monster Army member Giant Vabo (Nagao), but they were mostly unsuccessful. Moreover, their alliance with Tajiri broke up when he was brainwashed in a storyline by Yinling into joining Monster Army, so they enlisted Ryoji Sai to help them to turn Tajiri back into his former self. They eventually brought Tajiri back to his senses in 2007, returning to their usual trios matches.

In 2009, Kushida got into a heated rivalry with his Monster Army counterpart, NWA International Junior Heavyweight Champion Ray Ohara. Kushida faced Ohara several times for his title, but was defeated each time despite Tajiri's best efforts to help him. Ohara allied himself with Minoru Fujita as his mentor to counter Tajiri, and stipulated a last title match in which Kushida would put his Hustle career in line. Kushida accepted, but was defeated due to a miscommunication with Tajiri, forcing him to abandon the Hustle Army and the promotion itself.

All Japan Pro Wrestling and Osaka Pro Wrestling (2007–2008) Kushida started competing in All Japan Pro Wrestling in July 2007, wrestling against Ryuji Hijikata and T28. In February 2008, Kushida teamed up with T28 to participate in the U-30 Tag Team Tournament, a one night tournament that featured AJPW's top young wrestlers. The team defeated CJ Otis and Mototsugu Shimizu in the first round, Kaji Yamato and Taishi Takizawa in the second round and the team of Daichi Kakimoto and Manabu Soya in the finals to win the U30 Tag Team tournament. The team would go on to compete in AJPW's 2008 Junior Tag League, the team ended up tied for last place with only four points for two victories and three losses.

Kushida and Tajiri competed in Osaka Festival 2008 and reached the semi-final of the tournament but were knocked out by Daisuke Harada and Zeus. Kushida also competed in the Mondo 21 Cup 13-man battle royal. On 12 June, Kushida won his first three-way dance against Kuishinbo Kamen and Kanjyuro Matsuyama. After teaming up with Billyken Kid and defeating Takoyakida and Tigers Mask, Kushida went on a winning streak at Osaka Pro Wrestling in both singles and tag team matches which is still intact today.

North America promotions (2009–2010, 2016) In March 2009, Kushida faced Rey Ohara in a loss that marked a turning point in his career, as the stipulations forced him to leave Japan. Kushida went on to compete in wrestling promotions in Canada, Mexico, and the United States, most notably Chikara and Border City Wrestling. Kushida participated in a steel cage match for the BSE Suicide Six Pack title in which he was defeated by Tyson Dux. On November 3, 2010, while competing for Canadian Wrestling's Elite, he challenged for the CWE Championship against AJ Sanchez, but failed to win the title. Kushida won his last match in Canada, defeating Michael Von Payton at Capital City Championship Combat on March 13, 2010. In October 2010, Kushida made two appearances for American promotion Ohio Valley Wrestling (OVW).

On June 1, 2016, the Mexican Consejo Mundial de Lucha Libre (CMLL) promotion announced Kushida as a participant in the 2016 International Gran Prix. On June 25, Kushida made it to the semifinals of Lucha Libre Elite's World Championship tournament, before losing to Volador Jr. On July 1, Kushida took part in the 2016 International Gran Prix, from which he was eliminated by La Máscara. On July 8, Kushida unsuccessfully challenged Volador Jr. for the NWA World Historic Welterweight Championship. On July 12, Kushida and Marco Corleone won a one-night tag team tournament, defeating Rey Escorpión and Shocker in the finals. The tournament concluded his Mexican tour.

Smash (2010–2011, 2012) Kushida was in the main event at Smash.1 where he defeated Hajime Ohara, and went on to team with Lin Byron to defeat Ohara and Syuri in the main event of Smash.2. Kushida lost to Prince Devitt in Smash.3's main event. Kushida defeated Isami Kodaka in a world tryout match on Smash.4, only to lose his next three matches for the promotion. He ended his losing streak alongside Tajiri and Akira Shoji with a victory against Ohara, Jessica Love, and Kageman Guro at Smash.8. At Smash.9, Kushida challenged Mike Mondo for the OVW Heavyweight Championship, but lost. At Smash.10 Kushida participated in his first hardcore match, teaming with Super Crazy and Isami Kodaka to defeat Hajime Ohara, Heimo Ukonselkä, and Jessica Love. Kushida's initial run with Smash ended on March 31, 2011, at Smash.15, where he was defeated by Ohara. On March 14, 2012, Kushida returned to Smash to compete in the promotion's final event, in a victory over Yusuke Kodama.

New Japan Pro-Wrestling First storylines (2010–2012) Kushida participated in the annual Best of the Super Juniors tournament, which began on May 30, 2010. He participated in seven matches winning four out of them, giving him a total of eight points, just coming shy of the semi-finals. Kushida also participated in the new tag team tournament called Super J Tag Tournament, Kushida partnered with Gedo. The pair first went up against Kota Ibushi and Austin Creed, Kushida pinned Austin to advance to the semi-final. However the pair lost to Ryusuke Taguchi and Prince Devitt in the semi-final so were out of the tournament. Kushida then went on to team up with Hiroshi Tanahashi and Tajiri to compete in J Sports Crown Openweight 6 Man Tag Tournament 2010, the team beat Chaos to progress to the finals where they were eventually beaten by Hirooki Goto, Prince Devitt, and Ryusuke Taguchi. Kushida participated in Super J Tag League teaming up with Akira in block B, the pair won two matches and lost two matches amassing a total of four points, missing out on the final by two points.

On February 25, 2011, it was announced that Kushida, with Tajiri's blessing, would be leaving Smash and becoming a full-time member of the New Japan roster, beginning on April 1. On March 19 Kushida unsuccessfully challenged Prince Devitt for the IWGP Junior Heavyweight Championship. On May 26, Kushida entered the 2011 Best of the Super Juniors tournament. After winning five out of his eight-round robin stage matches, he finished fourth out of the nine wrestlers in his block, narrowly missing the semifinals of the tournament. Kushida then went on to compete in J Sports Crown Openweight 6 Man Tag Tournament 2011 with Hiroshi Tanahashi and Máscara Dorada, however the trio were beaten in the second round by Jyushin Thunder Liger, Karl Anderson and Giant Bernard. On August 27, 2011, he participated in the Destroyer Cup, a special battle royal at All Together. On September 19, Kushida was set to challenge Kota Ibushi for the IWGP Junior Heavyweight Championship, but a week earlier, Ibushi was forced to pull out of the match and vacate the title, after dislocating his left shoulder. Kushida was then booked in a decision match against former champion Prince Devitt to determine a new champion. On September 19, Kushida was defeated by Prince Devitt in a match for the vacant IWGP Junior Heavyweight Championship. On November 12 at Power Struggle, Kushida and Tiger Mask unsuccessfully challenged Davey Richards and Rocky Romero for the IWGP Junior Heavyweight Tag Team Championship.