Education
Nihon University.
向井 寛史
Nihon University.
Mukai challenged Pongsaklek Wonjongkam with the WBC Flyweight title on the line on December 23, 2011, but the fight ended in a first round technical draw, so Wonjongkam retained the title. Mukai faced Srisaket Sor Rungvisai on November 15, 2013 with the WBC Super Flyweight title on the line, but lost when his corner threw in the towel in the ninth of twelve rounds.