Masaaki Noiri

On February 25, 2007, at the age of thirteen, Noiri participated in a try-out held by the K-1 kickboxing organization and was taken on as one of Japan's youngest prospects.

[15] Noiri continued to show promise by winning the New Japan Karate Federation's K-2 Lightweight Grand Prix on May 3, 2009.

Noiri was drawn against the previous year's Koshien champion, Hiroya, in the semi-finals and caused an upset by winning a unanimous decision from the judges.

[14] Noiri debuted as a professional kickboxer on March 14, 2010, in his home town of Nagoya, defeating Shinji Aseishi by unanimous decision.

[9] After finishing both Violence and Daizo Sasaki in the same night on October 10, 2011,[9] Noiri advanced to the tournament's final stage held at Krush.14 on December 9, 2011.

The semi-finals saw Noiri rematch Hiroya and cruise to a unanimous decision (30–27, 30–28, 30–28) after sending his opponent to the canvas in round one.

[9] Noiri ended the year with a unanimous decision victory over Kengo Sonoda at Fight For Japan: Genki Desu Ka Omisoka 2011 on December 31, 2011.

The previously unknown Dutch-Armenian fighter scored a major upset with a unanimous decision win, flooring Noiri twice in the second round before getting dropped himself in the third.

[9] Three months later, Noiri returned to 63 kg/138 lb and bounced back with a unanimous points (30–27, 30–27, 30–28) win over Makihira Keita at Krush.22.

[9] The end of 2012 saw lightweight's previous kingpin Yuta Kubo move up in weight, and so Noiri then took his place as number one in the world rankings.

[9] He solidified his place as the world's top lightweight[9] with a unanimous decision (30–28, 29–27, 29–28) win over Yetkin Ozkul at Krush.24 in Tokyo on November 10, 2012.

[9][27] He then dominated Makoto Nishiyama en route to a second round referee stoppage in a non-tournament bout at the Krush Grand Prix 2013 ~67kg First Class Tournament~ on January 14, 2013.

[9] Moving up to the super lightweight division, Noiri was invited to the Road to Glory Japan −65kg Slam on March 10, 2013, and had his rubber match with Hiroya in the quarter-finals.

This fight was much closer than their first two affairs as Noiri was only able to pick up a majority decision due to a point deduction for low blows to Hiroya, resulting in scores of 30–29, 30–29 and 29–29.

[28][29] In the quarter-finals, he defeated Liam Harrison via TKO due to a cut in round two, and in the semis he outpointed Mosab Amrani.

[9] Noiri challenged Tetsuya Yamato for his WBC Muaythai International Super Lightweight Championship at an NJKF event in Tokyo on February 16, 2014.

[42] On January 10, 2016, it was announced that Noiri would be one of eight participants in the 2016 K-1 Super lightweight (-65 kg) Grand Prix, which was scheduled to take place on March 4, 2016.

[43] Noiri faced Minoru Kimura in the quarterfinals of the one-day tournament and was able to overcome the Brazilian fighter by a first-round knockout, flooring Kumura with a flying knee with just six seconds left in the opening round.

[47] Noiri faced the Wu Lin Feng Rookie of the Year Wang Pengfei at Krush 68 on August 20, 2016.

[49] Noiri returned to K-1 to face Younes Smaili at K-1 World GP 2017 Lightweight Championship Tournament on February 25, 2017.

[51] Noiri made his first NDC -66 kg title defense against Abdellah Ezbiri at "Nuit Des Champions 2017" on November 25, 2017.

[53] Noiri made his first K-1 Super lightweight championship defense against Tetsuya Yamato at K-1 World GP 2018: K'FESTA.1 on March 21, 2018.

[58] Noiri next faced the Krush Super Welterweight champion Jordann Pikeur at K-1 World GP 2019: K’FESTA 2 on March 10, 2019.

[69] He made quick work of FUMIYA, as he floored the journeyman with a right hook at the 2:10 minute mark of the opening round.

[70] Noiri faced the undefeated Krush Welterweight champion Ayinta Ali in the penultimate bout of the tournament.

[78] Noiri faced the reigning SUPERKOMBAT Middleweight Champion Amansio Paraschiv in a catchweight bout at K-1 World GP 2023 on July 17, 2023.