A professional competitor since 2011, Shiratori began his career as a muay thai fighter, most notably winning the WPMF Japan title in 2013.
[15][16] Shiratori made his kickboxing rules debut against Takuya Saito at J-NETWORK J-FIGHT in SHINJUKU -vol.24- on February 19, 2012.
He was scheduled to fight Fumiya Iwashita at M-1 Muay Thai Challenge Sutt Yod Muaythai vol.1 Part 1 on March 25, 2012, in the semifinals of the 2012 Next Heroes Cup.
[20] He won the fight by unanimous decision, managing to knock Kurashina with a headkick in the third round, with scores of 29–27, 30-26 and 30–26.
[25] This two-fight winning streak earned Shiratori the chance to fight Takahito Fujimaki for the WPMF Japan Super Featherweight title at M-FIGHT The Battle of Muaythai III on December 1, 2013.
[2] Shiratori was scheduled to fight Seo Dong Pong at Muay Lok 2014 -1st- on April 27, 2014, in a non-title bout.
Pong won the fight by a third-round technical knockout, dropping Shiratori three times inside of the first 48 seconds of the third round.
[27][28] Three months later, Shiratori was scheduled to fight another non-title bout against Tsuyoshi M16 Muaythaistyle at Muay Lok 2014 -2nd- on July 13, 2014.
Shiratori would go on to win eight of his next ten boxing matches, before challenging Izuki Tomioka for the Japanese Youth Lightweight.
[31] He won the fight by a first-round knockout, dropping Kazuma with a left straight at the very end of the round.
Shiratori won the fight by a third-round stoppage, knocking Uzatsuyo out with a well timed knee midway through the round.
[40] Shiratori was scheduled to fight Hector Santiago in the first round of the 2019 RISE World Series on March 10, 2019.
They went into an extra extension round, as the fight was ruled a draw following the first three, after which Shiratori won by unanimous decision.
The two-time Rajadamnern Stadium lightweight champion advanced to the tournament semifinals after defeating Taiga Kawabe by unanimous decision.
He accepted the fight 24 days before the event, as a short notice replacement for Petpanomrung Kiatmuu9, who was unable to enter Japan due to the COVID-19 restrictions.
[62] Shiratori made quick work of Takahashi, knocking him down twice in the first round, with the referee stopping the fight following the second knockdown.
[64] Shiratori was scheduled to fight a rematch with Naoki Tanaka at RISE WORLD SERIES 2021 Yokohama on September 23, 2021.
The two previously fought in the semifinals of the 2020 Rise Dead or Alive tournament, which Tanaka won by a first-round technical knockout.
Shiratori was knocked down with a right hook at the 2:42 minute mark of the opening round, and although he was able to beat the eight-count, the referee nonetheless decided to wave the bout off.
He knocked YA-MAN down with a high knee in the second round, which proved to be the deciding factor on the scorecards.
[72] Shiratori was expected to face the Glory veteran Abdellah Ezbiri at RISE WORLD SERIES / SHOOTBOXING-KINGS on December 25, 2022.
[75] Shiratori faced the former two-weight Krush champion Daizo Sasaki at RISE EL DORADO 2023 on March 26, 2023.
[77][78] Shiratori faced the FFKMDA and WAKO France champion Alexis Sautron at MTGP Impact in Paris on June 24, 2023.
[81] Shiratori faced Zakaria Zouggary at RISE WORLD SERIES 2023 Final Round on December 16, 2023.
[86] Shiratori faced Faphayap Grabs at RISE WORLD SERIES 2024 YOKOHAMA on September 8, 2024.
[88] Shiratori faced Petpanomrung Kiatmuu9 in the quarterfinals of the GLORY RISE Featherweight Grand Prix, held on December 21, 2024, in Chiba, Japan.