is a Japanese professional Muay Thai fighter and kickboxer and the current inaugural ONE Championship Atomweight Muay Thai world champion. He is a five division champion and has formerly held Lumpinee, Rajadamnern, Thailand (PAT), WMC, WPMF, WBC, and IBF titles.
Known in Thailand as Nadaka Eiwa Sports Gym () he made his professional debut aged 14 at Lumpinee Stadium. Nadaka is the only foreign fighter in history to become a three division Rajadamnern champion and just the second foreigner after Youssef Boughanem to win a title at both Lumpinee Stadium and Rajadamnern Stadium.
Biography Amateur career On December 12, 2015, Nadaka fought against Hidenojo Shimizu (40 kg class #2) for the vacant title of SMASHERS 40 kg class championship, and won by unanimous decision. He was rated #1 at 40 kg class and won 16th belt in his career.
Professional career In 2015 Nadaka had his first bout at 14 in Lumpinee Stadium defeating Phansaeng Sakwarun by decision.
On April 3, 2016, Nadaka fought against Riichi Hoshino, and won by majority decision after 3R.
On May 6, Nadaka challenged for Isan Area (North-East area in Thailand) 42 kg class title in Buriram Province, Thailand, but lost by decision after 5R.
Winning WMC, WBC and IBF titles On November 13, 2016, Nadaka challenged Shushap Tor Ittiporn for his WMC Pinweight World title, but he lost by unanimous decision.
On April 9, 2017, Nadaka fought against Yaksaed Siriluck Muaythai for the vacant WMC World Pinweight title, and won by KO.
Winning Lumpinee and Rajadamnern Stadium titles On December 9, 2018, Nadaka fought against Hercules Phetsimean, the Rajadamnern & Lumpinee unified Mini flyweight champion, for his Rajadamnern titile, and he won by unanimous decision after 5R.
On February 7, 2019, Nadaka fought against Bakjo Auddonmuang at Lumpinee in Bangkok, Thailand as a non-title 106 lbs bout and won by TKO with a left cross at 3R. Originally, he was going to fight against Olaylek Sor.Kaenjai.
On February 24, 2019, Nadaka fought against Bigone Sor.Sirilux for the vacant title of Lumpinee Stadium of Japan (LPNJ) Mini flyweight championship, and this bout was also for Nadaka's test match for challenging Lumpinee Stadium title. He knocked out Bigone by KO with left body hook at 1R 2:29.
On April 14, 2019, Nadako fought against Singdum Kafaefogus for the vacant title of Lumpinee Mini flyweight championship which had been returned by Hercules Phetsimean, and he won by unanimous decision after 5R. Nadaka became the current champion of 3 titles of Lumpinee, Rajadamnern, and International Boxing Federation Muaythai.
Yoshinari fought Kengkla Numponthep for the vacant Muay Thai Naikhanomtom Association (MNA) Light Flyweight title, in June 2019. He won the fight by unanimous decision.
In his next fight, on July 18, 2019, Yoshinari fought Isantai Sitchefboontham for the IBF Muay Thai World Light Flyweight title. Sitchefboontham won the fight by decision.
BoM Flyweight champion In December 2019, Yoshinari participated in the Battle of Muay Thai Flyweight tournament, to crown the new BoM Flyweight champion. In the semifinals, he knocked Lee Ji Sung out midway through the first round. In the finals, Yoshinari knocked Chi Yeung Fung out, with a head kick in the first round.
In 2020, Yoshinari fought three times: he won a unanimous decision against Takuto Wor.Wanchai at BOM WAVE 01, a second round TKO of Yuushin at Rizin 22, and a second round knockout of Hidetora Abe at BOM WAVE 02. In his last fight of the year, Yoshinari was scheduled to fight Phetmalai Phetjaroenvit at Rizin 26. He knocked Phetmalai out in the first round.
Yoshinari was scheduled to fight Ibuki Bravely at BOM WAVE 04. He won the fight by a first-round left elbow knockout.
Yoshinari faced Chiakai, under kickboxing rules, at Rizin 29 – Osaka. He won the fight by a first-round technical knockout, after the ringside doctor stopped the fight in between the rounds.
Yoshinari faced Hitoshi Sato at BOM – ouroboros 2021 – on September 26, 2021. He won the fight by a first-round knockout.
Yoshinari faced Naoki Ishikawa at Rizin 31 - Yokohama on October 24, 2021. He won the bout via TKO after knocking down his opponent three times in the first round.
Yoshinari faced Khun NamIsan Shobukai for the WBC Muay Thai Super Bantamweight Nai Khanom Tom Challenge title at BOM WAVE 07 – Get Over The COVID-19 on December 5, 2021. He won the fight by unanimous decision.
Yoshinari was booked to face Yusei Shirahata at Rizin Landmark 2 on March 6, 2022. He won the fight by a second-round knockout.
Yoshinari was scheduled to face Phetnipon Sak.ChorRorBor for the Thailand flyweight (50.8 kg) championship at BOM WAVE 08 on April 24, 2022. Due to covid restrictions Phetnipon was replaced on short notice by Keito Naito. The bout would be competed at 55 kg, the heaviest weight in career for Nadaka. Nadaka won the fight by technical knockout in the second round when Naito's corner threw the towel after their fighter was knocked down for the third time.
Yoshinari was rescheduled to face Phetnipon Sak.ChorRorBor for the Thailand flyweight (50.8 kg) championship at BOM 36 on July 3, 2022. On June 22, it was revealed that the vacant WPMF Flyweight title would be on the line as well. Yoshinari won the fight by second round knockout with a left elbow strike.
Yoshinari faced Bandasak So Trakunpet at Super Rizin on September 25, 2022. He won the fight by a first-round technical knockout.
Yoshinari faced Chaichana Wor.WisetGym at JKA "KICK Insist 14" on November 20, 2022. He won the fight by a second-round knockout.
ONE Championship On January 31, 2025, it was announced that Yoshinari signed with ONE Championship and he made his debut against Rak Erawan on March 23, 2025, at ONE 172. He won the fight via knockout in round three.
Championships and accomplishments Amateur 2012 Bigbang Amateur -28 kg Champion 2013 Bigbang Amateur -31 kg Champion 2014 All Japan SMASHERS Tournament -35 kg Winner 2014 Muay Thai Windy Sports -35 kg Champion 2014 Battle Of Muaythai (BOM) -32.5 kg Champion 2014 Battle Of Muaythai (BOM) -35 kg tournament winner 2015 MAJKF Kick Jr -37 kg Champion 2015 Dragon Boxing Stadium (DBS) Kids -35 kg tournament winner 2015 WBC Muaythai All Japan Jr League -37 kg tournament winner 2015 Suk Wan Kingtong Real Champion Tournament -38 kg Winner 2015 SMASHERS -40 kg champion
Professional ONE Championship ONE Atomweight Muay Thai World Championship (Current, inaugural) One successful title defense 2025 ONE Championship Muay Thai Fighter of the Year
World Muaythai Council 2017 WMC World Pinweight champion
World Boxing Council Muaythai 2018 WBC Muaythai World Mini flyweight Champion 2021 WBC Muaythai Nai Khanom Tom Super Bantamweight Champion 2024 WBC Muaythai Diamond Super Flyweight Champion
International Boxing Federation 2018 IBF Muaythai World Mini flyweight Champion
Rajadamnern Stadium 2018 Rajadamnern Stadium Mini Flyweight (105 lbs) Champion 2023 Rajadamnern Stadium Flyweight (112 lbs) Champion One successful title defense 2023 Interim Rajadamnern Stadium Super Flyweight (115 lbs) Champion 2024 Rajadamnern Stadium Super Flyweight (115 lbs) Champion Two successful title defenses
Lumpinee Stadium 2019 Lumpinee Stadium Mini Flyweight (105 lbs) Champion
Muaythai Nai Khanom Tom Association 2019 MNA Light Flyweight (108 lbs) Champion
The Battle of Muaythai 2019 BoM Flyweight (112 lbs) Champion Professional Boxing Association of Thailand (PAT) 2022 Thailand Flyweight (112 lbs) Champion World Professional Muaythai Federation 2022 WPMF World Flyweight (112 lbs) Champion
Awards eFight.jp 4x Fighter of the Month (December 2018, April 2019, July 2022, February 2024) World Muaythai Organization 2024 WMO Fighter of the Year 2025 WMO Fighter of the Year
Fight record
|- style="background:#;" | 2026-10-17||||align=left| Rifdean Masdor || ONE Samurai 4 || Tokyo, Japan || || || |- ! style=background:white colspan=9 |
|- style="background:#cfc;" | 2026-09-12|| Win ||align=left| Har Ling Om || ONE Samurai 3 || Yokohama, Japan || Decision (unanimous) || 3 || 5:00
|- style="background:#cfc;" | 2026-04-29|| Win||align=left| Songchainoi Kiatsongrit || ONE Samurai 1 || Tokyo, Japan || Decision (unanimous) || 5 || 5:00 |- ! style=background:white colspan=9 | |- style="background:#cfc;" | 2025-11-16 || Win ||align=left| Numsurin Chor.Ketwina || ONE 173 || Tokyo, Japan || Decision (unanimous) || 5 || 5:00 |- ! style=background:white colspan=9 |
|- style="background:#cfc;" | 2025-08-29 || Win ||align=left| Hamada Azmani || ONE Friday Fights 122, Lumpinee Stadium || Bangkok, Thailand || TKO (leg injury) || 3 ||0:15 |- style="background:#cfc;" | 2025-06-27 || Win ||align=left| Banluelok Sitwatcharachai || ONE Friday Fights 114, Lumpinee Stadium || Bangkok, Thailand || Decision (Unanimous)|| 3||3:00 |- style="background:#cfc;" | 2025-05-11|| Win ||align=left| Chokdee Phetsaengthong|| BOM x Space One Japan|| Tokyo, Japan || KO (Straight to the body) || 1 || 1:59
|- style="background:#cfc;" | 2025-03-23|| Win ||align=left| Rak Erawan|| ONE 172 || Saitama, Japan || KO (Left cross) || 3 ||2:40
|- style="background:#cfc;" | 2024-12-26|| Win || align=left| Bakjo Sikunna|| SHOOTBOXING GROUND ZERO TOKYO 2024|| Tokyo, Japan || KO (Flying knee) || 1 ||2:57 |- style="background:#cfc;" | 2024-12-01 || Win ||align=left| Isaac Mohamed || Rajadamnern World Series Japan || Yokohama, Japan || Decision (Unanimous)|| 5||3:00 |- ! style=background:white colspan=9 |
|- style="background:#cfc;" | 2024-10-13 || Win ||align=left| Born Ponlek || BOM 49 || Tokyo, Japan || TKO (3 Knockdowns) || 3||2:13
|- style="background:#cfc;" | 2024-09-01 || Win ||align=left| Petchanuwat Nor.Anuwatgym || BOM 47 || Yokohama, Japan || KO (Left cross) ||2 ||2:42 |- ! style=background:white colspan=9 |
|- style="background:#cfc;" | 2024-07-14 || Win||align=left| Jomhod AutoMuayThai || Rajadamnern World Series Japan || Tokyo, Japan || Decision (Unanimous)|| 5||3:00 |- ! style=background:white colspan=9 |
|- style="background:#cfc;" | 2024-04-14 || Win ||align=left| Kevin Martinez || Rajadamnern World Series Japan|| Chiba, Japan || Decision (Unanimous)|| 3 ||3:00
|- style="background:#cfc;" | 2024-02-12 || Win ||align=left| Praewprao PetchyindeeAcademy || Rajadamnern World Series Japan || Tokyo, Japan || Decision (Unanimous)|| 5||3:00 |- ! style=background:white colspan=9 |
|- style="background:#cfc;" | 2024-01-21 ||Win ||align=left| Jaokhunthong Sor.Petchtawan || TOP BRIGHTS 1 || Tokyo, Japan || KO (Left cross) || 1 || 1:28
|- style="background:#cfc;" | 2023-12-23 || Win ||align=left| Chusap Sor.Salacheep || Rajadamnern World Series || Bangkok, Thailand || KO (Left cross) || 2 || 2:10 |- ! style=background:white colspan=9 |
|- style="background:#cfc;" | 2023-11-26 || Win || align=left| Rungsaknoi Sitniwat || JKA "KICK Insist 17" || Tokyo, Japan || KO (High kick)|| 2 ||0:21
|- style="background:#cfc;" | 2023-10-01|| Win||align=left| Chondaen Sitdaman || BOM 44|| Yokosuka, Japan || TKO (Left middle kick) || 1 ||0:48
|- style="background:#cfc" | 2023-09-09 || Win ||align=left| Soulixay Singsavath || Rajadamnern World Series || Bangkok, Thailand || KO (Elbow) || 1 || 1:25
|- style="background:#cfc;" | 2023-08-12|| Win ||align=left| Rungwittaya Lookchaomaesaitong || Rajadamnern World Series || Bangkok, Thailand ||TKO (Referee stoppage) ||4 || 2:15 |- ! style=background:white colspan=9 |
|- style="background:#cfc;" | 2023-07-09|| Win ||align=left| Waewwaw Wor.Klinpathum || BOM 41|| Tokyo, Japan || Decision (Unanimous)|| 5 ||3:00 |- ! style=background:white colspan=9 |
|- style="background:#cfc;" | 2023-05-14|| Win ||align=left| Phetnakorn Sor.Pettawan || HOOST CUP - Kickboxing World Cup in Japan || Tokyo, Japan ||KO (Knee to the body)|| 1 || 2:35
|- style="background:#cfc;"