is a Japanese professional wrestler and promoter primarily known under the ring name Tajiri (sometimes stylized as "TAJIRI"), he has also competed under his real name as well as under the names Aquarius and Kikkoman and briefly worked as the masked character Tigre Blanco.

He rose to international attention through his work for Extreme Championship Wrestling (ECW) from 1998 to 2001 and World Wrestling Federation / World Wrestling Entertainment from 2001 to 2008 and a return in 2016–2017. Early in his career, he worked for several Mexican promotions such as Consejo Mundial de Lucha Libre (CMLL). After leaving WWE in 2005 he has worked for a number of Japanese promotions including New Japan Pro-Wrestling (NJPW), Hustle, Pro Wrestling Noah (Noah) and Wrestle-1 (W-1). He was also the promoter and featured wrestler for the Smash promotion as well as its successor Wrestling New Classic (WNC). He is currently under a full-time contract with Kyushu Pro-Wrestling.

Over the years Tajiri has trained various wrestlers including Kushida, Minoru Fujita, Ray and Syuri. In ECW he won the ECW World Television Championship and formed a regular tag team with Mikey Whipwreck that won the ECW World Tag Team Championship on one occasion. In CZW, he was a one time CZW World Heavyweight Champion. During his years with WWE, he won the WWF Light Heavyweight Championship once, WCW United States Championship once, their Cruiserweight Championship on multiple occasions, the WWE Tag Team Championship with Eddie Guerrero and the World Tag Team Championship with William Regal. In AJPW, he has won their Gaora TV Championship, World Junior Heavyweight Championship two times and the 2018 Jr. Tag Battle of Glory tournament with Koji Iwamoto. In MLW, he was MLW Middleweight Champion.

Professional wrestling career Early career (1994–1998) Tajiri originally wanted to become a kickboxer and began training in the sport. However, after watching countless wrestling matches from Mexico, he entered the Animal Hamaguchi Wrestling gym and won its test match tournament. Tajiri debuted professionally in 1994 for International Wrestling Association of Japan (IWA Japan) with a loss to Takashi Okano. In 1996, Tajiri left CMLL to join the hardcore wrestling promotion Big Japan Pro Wrestling (BJW) in Tokyo, Japan. He debuted for BJW under the name Aquarius.

Tajiri joined Big Japan Pro Wrestling in 1995. On July 19, 1996, he defeated Dr. Wagner Jr. to win the CMLL World Light Heavyweight Championship but lost it to him on July 27. The championship changes were not approved by CMLL but done by Dr. Wagner Jr. and Aquarius as part of the tour. Since CMLL did not approve the championship reign they do not officially recognize Aquarius' championship reign, listing Dr. Wagner as one continuous reign during the time he toured Japan. On July 23, 1997, Tajiri teamed up with Ryuji Yamakawa to win the vacant BJW Tag Team Championship. They lost it to Gedo and Jado on December 22. The team would regain the titles eleven days later, before losing it to Shadow Winger and Shadow WX. Tajiri then beat Gedo to become the first BJW Junior Heavyweight Champion. He would later be stripped of the title when he left the company.

In 1996 and 1997, Tajiri made several appearances for the World Wrestling Federation (WWF) under the name Yoshihiro Tajiri as enhancement talent. His first match was teaming with Tim Patterson losing to The Godwinns on the episode of Monday Night Raw on April 22, 1996. On an episode of Monday Night Raw in July 1997, he lost to Taka Michinoku, whom the WWF was pushing as its rising star in the Light Heavyweight division at the time. Tajiri's final appearance was a tag match with Brian Christopher, losing to Scott Taylor and Michinoku on October 21. He would briefly work for CMLL in Mexico both in 1997 and 1998, before leaving in December 1998 to work for Extreme Championship Wrestling (ECW) full-time.

In 1997, Tajiri competed for New Japan Pro-Wrestling (NJPW), participating in the promotion's Best of the Super Juniors IV tournament as a guest from BJW. He won three matches but also lost three and did not advance from the first-round.

Extreme Championship Wrestling (1998–2001) Beginnings and World Television Champion (1998–2000)

After working in Mexico, Tajiri was hired by Extreme Championship Wrestling (ECW) based out of Philadelphia, Pennsylvania. He made his television debut in ECW on the December 24, 1998, episode of Hardcore TV, clad in traditional blue and white trunks with an insignia of Japan's rising sun, and picked up a victory over Antifaz Del Norte. He began a notable storyline rivalry with Super Crazy. The duo traded wins throughout 1999. His other notable single feuds included Little Guido and Jerry Lynn.

In early 1999, Tajiri began to emulate The Great Muta, who was one of Tajiri's wrestling heroes growing up. His wrestling trunks were replaced with baggy Karate gi pants, and he began spraying green mist into the face of his opponents. He aligned himself with Steve Corino, who promised to teach him the American way and help him to integrate himself into United States culture. With Tajiri's notoriety increasing, he received an ECW World Heavyweight Championship title shot against Taz at Heat Wave, and on an episode on ECW on TNN but failed to capture the title on both occasions. In 2000, he earned another shot at the championship against Justin Credible but lost once again.

In early 2000, Tajiri was recruited by Cyrus to join The Network group along with Steve Corino. During this time, Tajiri went up against Super Crazy for the ECW World Television Championship in a Japanese death match, a match with no disqualification and all weapons are legal. He lost but gained the title back in a three way dance involving Super Crazy and Little Guido. Shortly after becoming champion, Tajiri was asked by Cyrus to relinquish the belt to The Network so they could award the title to Rhino. Tajiri refused to turn the belt over and turned his back on the Network, becoming a babyface in the process. His first defense of the title ended in a no contest with Tommy Dreamer. Tajiri lost the title to Rhino on April 22. His rematch came on May 6, but he was unable to regain the title.

Unholy Alliance (2000–2001)

Tajiri would then form a tag team with Mikey Whipwreck, known as the Unholy Alliance, who were managed by The Sinister Minister. They entered the World Tag Team tournament and won the vacant ECW World Tag Team Championship in August 2000 at Midtown Massacre. The team then started feuding with The Full Blooded Italians and lost the World Tag Team Championship to them only a day after they first won them. They failed to recapture them at Anarchy Rulz and again at November to Remember.

Shortly after his alliance with Whipwreck, Tajiri's amusing antics in the ring, stiff contact with opponents, and comedic backstage vignettes made him one of the most popular wrestlers in ECW. Tajiri remained loyal to the company until it folded in April 2001. He participated in ECW's final two shows: on January 12, where he picked up a victory over Super Crazy, and January 13, 2001, when he lost to Super Crazy.

Independent circuit (2000–2001) With ECW's television deal being canceled in October 2000, the company had to make massive cuts. This resulted in Tajiri wrestling for the company for lower wages and led to him wrestling more frequently on the American and Mexican independent circuit. In IWA Puerto Rico, Tajiri teamed with Super Crazy as they unsuccessfully wrestled Andy Anderson and Vyzago for the World Tag Team Championship. He would also enter the Hardcore Championship invitational match but lost.

During this period, Tajiri had multiple CZW World Heavyweight Championship matches in the Combat Zone Wrestling (CZW) promotion. His first would be against Justice Pain. Tajiri lost to Pain twice but would later go on to beat Nick Berk to become CZW World Heavyweight Champion on February 28, 2001; however, Tajiri lost the title that same night to Zandig.

World Wrestling Federation / World Wrestling Entertainment (2001–2006, 2008) Championship reigns (2001–2004) Soon after the closure of ECW, Tajiri was hired by the World Wrestling Federation (WWF). Tajiri debuted on the May 24, 2001, episode of SmackDown! as a face. He was given the gimmick of WWF Commissioner William Regal's comedic assistant. With the help of Regal, Tajiri made his in-ring debut defeating Crash in a King of the Ring qualifying match on the June 14 episode of SmackDown!. He was later eliminated by Rhyno on the June 18 episode of Raw. Tajiri would win his first championship in WWF by defeating X-Pac for the WWF Light Heavyweight Championship on the August 6 episode of Raw. X-Pac would quickly capture the WCW Cruiserweight Championship, and at SummerSlam on August 19, Tajiri would lose a championship unification match, therefore retiring the Light Heavyweight Championship. Tajiri would quickly bounce back as he began an on-screen relationship with Torrie Wilson and defeated Chris Kanyon for the WCW United States Championship on the September 10 episode of Raw. However, Tajiri would lose the belt to Rhyno soon afterward at Unforgiven on September 23. After Regal turned heel by joining The Alliance, Tajiri feuded with him throughout late 2001.

Tajiri won the WCW Cruiserweight Championship on the October 22 episode of Raw. The title became the WWF Cruiserweight Championship and replaced the WWF Light Heavyweight Championship when the WWF defeated The Alliance at Survivor Series on November 18. The WWF was renamed World Wrestling Entertainment, and the roster was divided into two "brands": Raw and SmackDown!. Tajiri, along with Torrie Wilson, was drafted to SmackDown!, therefore making the Cruiserweight Championship a SmackDown! exclusive title. Tajiri went on to lose the title to Billy Kidman on the April 4, 2002 episode on SmackDown!. He would go on to beat Kidman at Backlash on April 21 once again and won the Cruiserweight Championship again only 17 days after losing it.

He turned heel by forcing Wilson to dress like a geisha against her will. Tajiri would go on to lose the Cruiserweight Championship to The Hurricane on the May 16 episode of SmackDown! in a triple threat match that also included Billy Kidman. Wilson eventually abandoned him during a Cruiserweight Championship match against The Hurricane; she did so by stripping on top of a table during the match that caused Tajiri to be counted out and later joined forces with Tajiri's rival, Maven. Tajiri became a face in WWE once more after Jamie Noble attacked him for touching Noble's girlfriend Nidia. This led to several Cruiserweight Championship matches between the two including matches at No Mercy on October 20 and Rebellion on October 26. He also participated in his first Royal Rumble match on January 19, 2003.