Masamichi Yabuki

Yabuki made his professional debut against Shohei Horii on March 27, 2016. He won the fight by a first-round technical knockout. He would go on to amass a 7–3 record over the next two years, most notably losing a unanimous decision against Junto Nakatani on December 23, 2016, and a split decision to Daniel Matellon on September 28, 2018.[4]

Yabuki won his next three fights, achieving stoppage victories against Bae Min-Chul, Ryuto Oho and Rikito Shiba, before he was scheduled to face Tsuyoshi Sato for the vacant Japanese light flyweight title on July 26, 2020. Yabuki stopped Sato with a left hook, near the end of the first round.[5] He was scheduled to make his first title defense against Toshimasa Ouchi on December 26, 2020.[6] He won the fight by unanimous decision.[7]

Yabuki, at the time the #1 ranked WBC light flyweight contender, was scheduled to challenge the reigning WBC light flyweight champion Kenshiro Teraji, in Shiro's ninth title defense, on September 10, 2021, at the City Gym in Kyoto, Japan.[8] The bout was later postponed for September 22, 2021, as both Shiro and his coach tested positive for COVID-19.[9] The fight was rescheduled for September 22, 2021.[10] Yabuki won the fight by a tenth-round technical knockout. He appeared to be ahead on the scorecards heading into the tenth round, which prompted Shiro to increase his pace and volume. Although Shiro seemed close to finishing him, Yabuki managed to take over the round near its end and unload with volume which forced the referee to stop the fight.[11]