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.{{Cite web |date=2025-03-23 |title=Nadaka Yoshinari crushes Rak Erawan in ONE debut – ONE 172 Results == Championships and accomplishments==