Mitsuya Nagai

Nagai would later debut and make Pro Wrestling Noah his home in late 2017, entering the 2017 Global League where a loss to Naomichi Marufuji stopped him from reaching the final.

In September 2010, he beat Alexander Otsuka to win Real Japan Pro Wrestling (RJPW)'s Legend Championship. He held the title for nearly a year before dropping it to Super Tiger in July 2011. Nagai won it back from Tiger in March 2012, and again dropped it to Tiger in December. In January 2014, Nagai's appearances in Dradition became more sporadic, and he instead became a regular in All Japan Pro Wrestling (AJPW) once again, forming the Dark Kingdom stable with Kenso, which would later add Black Tiger VII, Black Tiger and Takeshi Minamino to its ranks. As Dark Kingdom, Nagai and Minamino won the All Asia Tag Team Championship in January 2015. They dropped the titles to Ultimo Dragon and Yoshinobu Kanemaru in March.

After leaving New Japan, Nagai debuted for Dramatic Dream Team (DDT), choosing a lighter schedule in a comedy promotion which would allow his injury to heal at a quicker a rate. He aligned himself with Poison Sawada Julie's Serpent Council in late 2006, and also began competing for Tatsumi Fujinami's Muga World Pro Wrestling around this time. It was in MUGA Nagai would find his new home, competing regularly for the next few years while also making occasional appearances in DDT and various shoot style promotions such as Battlarts and Daisuke Ikeda's Fu-Ten. In February 2009, he wrestled Canadian wrestler Test in what would be Test's last match before he died the following month.

After the Makai Club broke up in the summer of 2004, Nagai began a face turn, returning to AJPW for one night only on July 22 where he lost to his mentor Toshiaki Kawada. It was also during this time that he aligned himself with fellow Rings alumni Masayuki Naruse, with the two unsuccessfully challenging Genichiro Tenryu and Masanobu Fuchi for the All Asia Tag Team Championship on July 26. Around this time, Nagai joined Black New Japan while keeping his team with Naruse, which caused friction between them. On November 3 at Masahiro Chono's 20th Anniversary Show, they challenged once again, this time beating Fuchi and Tenryu to win the titles. He also returned to AJPW in December, teaming with Kawada for the Real World Tag League. They made it to the playoffs, where a loss to a RO&D (Jamal and Taiyo Kea) stopped them from reaching the final. After dropping the All Asia belts in February, Nagai suffered an injury competing against Naruse in March which would keep him out of action for the rest of 2005. In January 2006, Nagai was one of a number of New Japan wrestlers who opted not to renew their contracts with the promotion and became a freelancer.

Immediately after leaving AJPW, Nagai was signed by New Japan Pro Wrestling (NJPW), whom he had previously worked for during the inter-promotional relationship between both promotions. Due to his background in kickboxing and Rings, Nagai was placed into the Makai Club, a group of wrestlers with legitimate backgrounds in martial arts. Nagai debuted under a mask as Makai #5 at Wrestling World 2003, teaming with the returning Katsuyori Shibata, who was now masked and competing as Makai #4. In their debut as a team, the two defeated Nagai's former partner Masahito Kakihara and Takashi Iizuka. After defeating Kakihara in singles action at Ryogoku Kokugikan in February, Makai #5 voluntarily unmasked himself as Nagai, though he continued to compete as both himself and Makai #5 after this. In July, Makai #5 and #4, who had dubbed themselves Halimao'z (破悧魔王'Z , Harimaozu, "Devil Demon King'z") , challenged for the IWGP Tag Team Championship, losing to reigning champions Hiroshi Tanahashi and Yutaka Yoshie in Osaka. Nagai competed at Wrestling World 2004, teaming with Makai #1, Ryushi Yanagisawa and Ryota Chikuzen to defeat the Crazy Dogs (Enson Inoue, Hiro Saito, Michiyoshi Ohara and Tatsutoshi Goto). Nagai would compete twice at NJPW's King of Sports pay-per-view in March, first teaming with Shibata, #1 and Yanagisawa to defeat Blue Wolf, Shinya Makabe, Toru Yano and Yutaka Yoshie, but later losing to Josh Barnett in a singles match.

After 2 years with the promotion, Nagai left All Japan in December 2002.

On June 6, 2001, Nagai was involved in an incident during a match against NJPW wrestler Takashi Iizuka at an NJPW show, where Nagai delivered a kick to Iizuka's face which resulted in Iizuka being severely concussed and needing over a year off to recover. Two days later when the NJPW roster came to the AJPW show in Nippon Budokan, Nagai and Kakihara beat NJPW's Yuji Nagata and Shinya Makabe to win the vacant All Asia Tag Team Championship, however, their reign was cut short after Kakihara suffered a knee injury and eventually left All Japan for NJPW after he had recovered, effectively breaking up Team Strongs. Nevertheless, Nagai's position as a loyalist in the post-exodus era All Japan continued to rise, and he teamed with Toshiaki Kawada in a loss to TenCozy (Hiroyoshi Tenzan and Satoshi Kojima) on September 16 on an NJPW card. Nagai teamed up with Kawada again for the 2001 Real World Tag League, seeing much greater success than the previous year, earning 10 points and making it to the final where they lost to Keiji Mutoh and Taiyo Kea. In early 2002, he entered the Giant Baba Memorial Cup, a tournament focused on young wrestlers where he dominated, earning 24 points and beating Nobutaka Araya in the final to win the tournament. Not long after winning, he entered the 2002 Champion Carnival and performed respectably, earning 6 points but failing to reach the final. In what would be his final tour with All Japan, Nagai partnered with Yoji Anjo for the 2002 Real World Tag League, earning 4 points and failing to reach the final.

Almost immediately after Battlarts began its hiatus, Nagai was announced for the 2000 Real World Tag League in All Japan Pro Wrestling (AJPW), the promotion he had originally hoped to join in high school. Nagai was paired up with fellow UWF alumnus Masahito Kakihara, calling themselves "Team Strongs". Despite the name, Team Strongs performed poorly in the tag league, earning just two points with a win over Barry Windham and Kendall Windham. In only his second match, Nagai lost to AJPW's top star Toshiaki Kawada, and, even though he lost, he earned Kawada's respect and was selected to be his new tag partner. As a newcomer, Nagai was required to prove himself before he entered the 2001 Champion Carnival, and thus was put into the Champion Carnival Qualifying League. Nagai excelled in the qualification league which granted him entry to the Champion Carnival where he struggled, again earning just one win and two points. Despite mixed success and his newcomer status, Nagai was pushed as an All Japan loyalist and represented the company in interpromotional matches during AJPW's working relationship with New Japan Pro Wrestling (NJPW).

In 1997, Nagai got a license by the All Japan Kickboxing Federation and competed at the Kick Over IX event as a RINGS representative. It would be his last year in the promotion, as he left RINGS after a match with Akira Maeda in which Maeda shot on him after the bell.

After leaving RINGS Nagai briefly pursued a career in kickboxing, and fought in K-1 between 1997 and 1999. His kickboxing career was unsuccessful, and he retired with a record of 6 losses and 1 draw in August 1999. With his kickboxing career over, Nagai turned his hand to pro-wrestling, and joined Yuki Ishikawa's shoot style promotion Battlarts. His run was somewhat successful, with Nagai earning victories over established wrestlers like Takeshi Ono, Yuki Ishikawa and Katsumi Usuda. In the 2000 Young Generation Battle, Nagai went undefeated for the entirety of the tournament, beating Usuda, Mohammed Yone, Mach Junji, Rastaman and Minoru Tanaka to reach the final, where he lost to Alexander Otsuka. After Battlarts went on hiatus beginning in November 2000, Nagai and the rest of the roster were forced to leave the promotion.

In 1994, Nagai looked to ascend the scale by taking part on the Mega Battle Tournament 1994, eliminating Ameran Bitsadze on the first round, but then losing to Chris Dolman in the second. Next year, he faced Dick Vrij in a shoot rematch held in RINGS Holland on February 19, 1995, but he fell knocked by a knee strike while Vrij was illegally holding the ropes in the corner, an action which went unnoticed or the referee. However, Mitsuya would get booked for a trend of victories back in Japan, beating the likes of Andrei Kopylov, Yoshihisa Yamamoto and Carl Greco. He finally would get his retribution over Vrij submitting him via heel hook on a third shootfight in August 24, 1996. Nagai then got the greatest victory until the moment, submitting Tsuyoshi Kohsaka in a match, but his momentum got cut short by Kiyoshi Tamura at the Mega Battle Tournament 1996.

Nagai debuted in RINGS on August 1, 1991 in a match against Herman Renting. He revealed himself as a promising rookie, showing will and toughness, but aside of a high-profile match against Gerard Gordeau on December 7, in which he was defeated in 0:34, Nagai was relegated to low profile matches. He qualified for the Mega Battle Tournament 1991, but was eliminated on the first round by Masaaki Satake. Nagai competed both in professional wrestling and mixed martial arts, though only sporadically in the latter. He was defeated by Dick Vrij on May 16, 1992 by TKO, and would also lost to Willie Peeters on July 16, 1992, both in special shoot matches.

Hirokazu Nagai (長井 弘和 , Nagai Hirokazu, born November 10, 1968) , better known as Mitsuya Nagai (長井満也 , Nagai Mitsuya) , is a Japanese mixed martial artist, kickboxer and professional wrestler. He is known for his work in Fighting Network RINGS and later in pro wrestling companies like Battlarts and New Japan Pro Wrestling (NJPW). He currently wrestles for Dradition Pro Wrestling (Dradition) and Pro Wrestling Noah (Noah).