[2] Hiraoka made her professional kickboxing debut against the two-time K-1 Challenge tournament winner KANA at Krush 58 on September 12, 2015.
[6] Hiraoka faced Emi Matsushita at in the semifinal bout of the tournament at Krush 80 on September 8, 2017.
[13] Hiraoka faced Momoka Mandokoro at RISE WORLD SERIES 2019 Final Round on July 13, 2019.
[15] Hiraoka faced Reina Sato at the inaugural RISE GIRLS POWER event on November 8, 2019.
[17] Despite knocking the champion down with a spinning heel kick in the third round, Hiraoka nonetheless lost the fight by unanimous decision, with scores of 48–47, 47–46 and 47–46.
Hiraoka stepped in as a short-notice replacement for Megami, who withdrew from the bout two-weeks prior with a right ulna fracture.
[26] Hiraoka faced Arina Kobayashi in an open-finger glove bout at RISE 163 on December 10, 2022.
[27] Hiraoka faced Minori Kikuchi in another open-finger glove bout at RISE 167 on April 21, 2023.
[28] Hiraoka next faced Honoka Kobayashi at RISE Fight Club on November 19, 2023, once again in an open-finger glove bout.