[1][2] Tsubasa made his professional debut against Yuma Sano at JKA "KICK Insist 6" on November 6, 2016.
[3] Next year, at SNKA "WINNERS 2017 2nd" on May 14, Tsubasa would fight to a career first decision draw against Kyohei Furumura.
[9] Tsubasa was expected to face Ikko Ota at KICK Insist 10 on March 15, 2020, in a "JKA vs. NJKF" themed bout.
[10][11] Tsubasa faced the WMC Japan Super Bantamweight champion Yugo Kato in a non-title bout at NO KICK NO LIFE on July 22, 2021.
[15] Kyosuke won the fight by a second-round technical knockout, handing Tsubasa the first stoppage loss of his professional career.