Lightweight Early career Noiri debuted as a professional kickboxer on March 14, 2010, in his home town of
Nagoya, defeating Shinji Aseishi by unanimous decision. Following this, he was recruited by Krush and went 3–0 in the promotion, including two KO wins, before entering the Krush First Generation King Tournament at −60 kg/132 lb which began on December 12, 2010. He was victorious over Junpei Aotsu in the tournament's first round but was then defeated by Yuji Takeuchi in the quarter-finals on April 30, 2011. Noiri floored Takeuchi in the second round and again at the beginning of the third when both men knocked each other down with concurrent left hooks. Takeuchi, knowing that he had to stop Noiri to win the fight, came back aggressively towards the end of the fight, however, and violently knocked Noiri out with a left hook to send him crashing out of the tournament. Despite having recently suffering the first loss of his professional career, Noiri was invited to the
K-1 World MAX 2011 –63 kg Japan Tournament Final, a one-night tournament made up of eight of Japan's best lightweights, on June 25, 2011. He faced a tough test in the quarter-finals against the more experienced Ryuji Kajiwara. The bout was called a draw after three rounds and so an extension round was added to decide the winner, after which Noiri was given a close
split decision. In the semis, he went up against the previous year's runner-up in
Yuta Kubo and came out on the losing side of a unanimous decision.
Supernova tournament He then returned to Krush to compete in the 2011 Under-22 ~63 kg Supernova~ Tournament. To kick off 2012, he bested his first international opponent, Frenchman Cedric Peynaud, with a unanimous decision (30–28, 29–28, 29–28) at
Krush.17 on March 17, 2012. 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. 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. He faced fellow Japanese native
Yuta Kubo in a rematch in the final. He suffered a brutal
low blow in the first round and wasn't able to rally back until the third. It was too late by that time, however, and he lost the decision.
Return to Krush In his first match under
Muay Thai rules, Noiri knocked out Seiji Takahashi with a third round front kick to the face for the vacant World Boxing Council Muaythai Japan Super Lightweight (−63.503 kg/140 lb) Championship at a New Japan Kickboxing Federation event on July 15, 2013. Noiri had his rubber match with Yuta Kubo at Krush.32 in Nagoya on September 1, 2013, defeating Kubo for the first time in three attempts to take his Krush 67 kg/147 lb title and put an end to his seventeen fight win streak in the process. He lost the fight by a unanimous decision, with scores of 49–47, 50–47 and 49–48. Noiri faced Atsushi Ogata at Krush 48 on December 21, 2014. He won the fight by a first-round knockout. Noiri next faced the
Enfusion -67 kg champion
Ilias Bulaid at Krush 51 on February 6, 2015. He won the fight by unanimous decision, with all three judges scoring the bout 30–27 in his favor. His two fight win streak was snapped by
Massaro Glunder however, who stopped him 40 seconds into the second round at
K-1 World GP 2016 -65kg World Tournament on June 24, 2015, in the quarterfinals of the 2015 K-1 super lightweight Grand Prix. Noiri faced
Hideaki Yamazaki at Krush.57 in NAGOYA on August 22, 2015. He won the fight by unanimous decision, after an extra fourth round was contested. Noiri next faced
Yasuomi Soda at
K-1 World GP 2015 The Championship on November 21, 2015. He won the fight by unanimous decision, with two scorecards of 30–28 and one scorecard of 30–29.
Super lightweight Grand Prix 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. 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. Noiri advanced to the semifinals, where he faced the one-time
Krush super lightweight champion
Hiroya. He won the fight by majority decision, with two judges scoring the bout 29–27 and 29–28 in his favor, while the third ringside official had it scored as an even 28–28 draw. Noiri faced
Hideaki Yamazaki in the finals, a rematch of their August 22, 2015 encounter, which Noiri won by unanimous decision. He was less successful in their second meeting, as Yamazaki won both the fight and the title by majority decision. His success in the Japan Grand Prix earned him a place in the K-1 World Super lightweight Grand Prix as well, which took place on
June 24, 2016. Noiri faced
Massaro Glunder in the quarterfinals. He avenged his previous defeat to Glunder, as we won the fight by unanimous decision, with two scorecards of 30–28 and one scorecard of 30–26. Glunder was twice deducted a point to excessive holding, one in the second and one in the third round. Noiri faced the two-time K-1 Grand Prix winner
Kaew Fairtex in the semifinals. He lost the fight by unanimous decision, with scores of 29–28, 30–29 and 29–28.
Super lightweight champion Noiri faced the
Wu Lin Feng Rookie of the Year
Wang Pengfei at Krush 68 on August 20, 2016. He won the fight by a first-round knockout. After he successfully bounced back from his loss to Kaew, Noiri faced
Eddy Nait Slimani for the vacant Nuit Des Champions -66 kg championship at "Nuit Des Champions 2016" on November 16, 2019, in what was his first fight outside of
Japan. He captured the title with a second round stoppage of the Frenchman. Noiri returned to K-1 to face
Younes Smaili at
K-1 World GP 2017 Lightweight Championship Tournament on February 25, 2017. Noiri then challenged
Kaew Fairtex for the
K-1 World GP Super Lightweight (-65 kg) Championship at
K-1 World GP 2017 Super Middleweight Championship Tournament on June 18, 2017. He won the fight by split decision, after an extra fourth round was contested. Noiri faced Diego Freitas in a non-title bout at Krush 79 on August 20, 2017. He won the fight by a second-round knockout. Noiri made his first NDC -66 kg title defense against
Abdellah Ezbiri at "Nuit Des Champions 2017" on November 25, 2017. He lost the fight by unanimous decision. 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. Yamato previously beat Noiri by unanimous decision in a
muay thai rules bout on February 16, 2014. He wasn't able to replicate that success in K-1 however, as Noiri won the fight by a third-round knockout. Noiri would fight at super lightweight twice more before moving up to welterweight (67.5 kg). He first stopped Vincent Foschiani with a left hook to the body at the 2:45 minute mark of the second round. Noiri followed this up with a first-round head kick knockout of Yang Haodong at Krush 92 on August 18, 2018.
Welterweight Move up in weight Noiri faced
Riki Matsuoka at
K-1 World GP 2018: K-1 Lightweight World's Strongest Tournament on December 8, 2018. He won the fight by a first-round knockout. Noiri next faced the
Krush Super Welterweight champion
Jordann Pikeur at
K-1 World GP 2019: K’FESTA 2 on March 10, 2019. He lost the fight by unanimous decision. Noiri rebounded from this loss by winning his next four fights: he beat Sami Lamiri by a second-round knockout at
K-1 World GP 2019: Japan vs World 5 vs 5 & Special Superfight in Osaka on August 24, 2019,
Hasan Toy by majority decision at
K-1 World GP 2019 Japan: ～Women's Flyweight Championship Tournament～ on December 28, 2019,
David Mejia at
K-1 World GP 2020: K’Festa 3 on March 22, 2020, and Vitor Tofanelli by unanimous decision at
K-1 World GP 2020 in Fukuoka on November 3, 2020. Noiri was expected to fight
Yodkhunpon Sitmonchai at
K-1: K’Festa 4, but the event was later postponed due to the
COVID-19 pandemic. He was instead rescheduled to face Playchumphon Sor.Srisomphong at
K-1 World GP 2021: K’Festa 4 Day.2. He won the fight by unanimous decision.
K-1 welterweight champion Noiri was expected to face
Kona Kato in the quarterfinal bout of the K-1 welterweight World Grand Prix, held at
K-1 World GP 2021: Yokohamatsuri on September 20, 2021. As Kato later withdrew due to
COVID-19 related problems, Noiri was rescheduled to face FUMIYA. 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. Noiri faced the undefeated
Krush Welterweight champion Ayinta Ali in the penultimate bout of the tournament. He needed just 92 seconds to knock Ayinta down twice for a technical knockout victory. Noiri faced the former
K-1 Super Lightweight champion Rukiya Anpo in the finals of the one-day tournament. Following an evenly contested first two rounds, Noiri was able to knock Anpo down three times in the final round of the bout for his third stoppage win of the evening. Noiri was booked to face
Kona Kato at
K-1: K'Festa 5 on April 3, 2022, in a non-title bout. He won the fight by second-round knockout, after knocking Kato down once in the previous round. Noiri faced the former
Shoot boxing Super Lightweight champion and the 2018 SHOOT BOXING S-Cup World Tournament winner
Kaito Ono at
The Match 2022 on June 19, 2022. He lost the fight by an extra round unanimous decision. Noiri faced the 148-fight veteran
Dzhabar Askerov at
K-1 World GP 2023: K'Festa 6 on March 12, 2023. He won the fight by a first-round knockout. Noiri faced the reigning SUPERKOMBAT Middleweight Champion
Amansio Paraschiv in a catchweight bout at
K-1 World GP 2023 on July 17, 2023. He won the fight by a first-round body-kick knockout.
ONE Championship Noiri announced his departure from K-1 on March 27, 2024. On April 23, 2024, it was announced that Noiri signed with
ONE Championship. Noiri made his promotional debut against
Sitthichai Sitsongpeenong on June 8, 2024, at
ONE 167. He lost the fight via unanimous decision. Noiri was scheduled to face Youssef Challouki on December 20, 2024, at
ONE Friday Fights 92.{{Cite web |date=2024-11-07 |title=【ONE FF】野杁正明の第2戦が決定、相手は"ザ・ピラニア"の異名を持ちシアサラニに勝利した強豪シャルキ＝12・20『ONE Friday Fights 92』 Noiri faced Shakir Al-Tekreeti on January 24, 2025, at
ONE 170.{{Cite web |last=Strobel |first=Kevin |date=2025-01-10 |title=Masaaki Noiri With Quick Turnaround Against Shakir Al-Tekreeti at ONE 170 on January 24 Noiri faced
Tawanchai P.K.Saenchai for the interim
ONE Featherweight Kickboxing World Championship on March 23, 2025, at
ONE 172.{{Cite web |date=2025-01-31 |title=ONE Championship adds four title fights to ONE 172 in Japan, including Tawanchai vs Noiri ==Championships and awards==