Shooto Naito began training mixed martial arts at the age of 22. Despite a rough start to his training and amateur competitions, he won the 2011 All Japan Amateur Shooto Tournament. Naito made his professional debut with the
Shooto organization on August 25, 2012, at the age of 27. He defeated Tsubasa Fujikawa via guillotine choke in round two in the semifinals of the Rookie Flyweight Tournament at Shooto - Gig Tokyo 11 on 25 August 2012. In the tournament finals, held at Shooto - The Rookie Tournament Final 2012 on 15 December 2012, he beat Shota Kondo by stoppage in the second round to become the 2012 Shooto Rookie Flyweight tournament champion. He won his next five fights to earn a title shot against reigning Shooto Flyweight Champion
Shinya Murofushi. In the main event of Shooto 7th Round 2014 on 27 September 2014, Naito submitted
Shinya Murofushi with three seconds remaining in the fight to win the
Shooto World Flyweight (114lbs) Championship. Naito made his first
Shooto World Flyweight (114lbs) championship defense against Ryuto Sawada at Shooto - Professional Shooto 7/26 on 26 July 2015. He won by arm-triangle choke in the fourth round. Naito made his second
Shooto World Flyweight (114lbs) championship defense against
Junji Ito at Shooto - Professional Shooto 11/29 on November 29, 2015. He won by decision.
One Championship Naito vacated the Shooto World Flyweight championship on April 22, 2016, after signing with
ONE Championship. Naito challenged the undefeated
ONE Strawweight World champion Dejdamrong Sor Amnuaysirichoke at
ONE Championship: Kingdom of Champions on 27 May 2016. He defeated the former
Lumpinee Stadium mini-flyweight and light-flyweight champion by rear-naked choke in the fourth round to become the ONE Strawweight World Champion. Naito made his first championship defense against the undefeated
Joshua Pacio at
ONE Championship: State of Warriors on 7 October 2016. He submitted Pacio by rear-naked choke in the third round to retain the belt. Naito made his second championship defense against the once-defeated Brazilian Jiu-Jitsu World Champion
Alex Silva at
ONE Championship: Warriors of the World on 9 December 2017. After five rounds, Silva defeated Naito by unanimous decision to hand him his first professional loss and take the belt. An immediate rematch between the pair was scheduled at
ONE Championship: Grit and Glory on 12 May 2018. This time, Naito was able to defeat
Alex Silva by split decision to reclaim the title. Naito made the first defense of his second ONE Strawweight World Title reign against
Joshua Pacio in a rematch from nearly two years earlier on 22 September 2018. He lost the fight by unanimous decision. Naito faced Rene Catalan at
ONE Championship: Reign of Valor on 8 March 2019. He lost the fight via technical knockout in the first round. Naito faced
Alex Silva for a third time at
ONE Championship: Enter the Dragon on 17 May 2019. He won by unanimous decision to complete their trilogy. Naito faced Pongsiri Mitsatit at
ONE Championship: Masters Of Fate on 8 November 2019 and defeated him by unanimous decision. Naito faced
Yosuke Saruta at
Road to One 3: Tokyo Fight Night on 10 September 2020. He lost the fight via unanimous decision. == Championships and Accomplishments ==