Mizuki made a pro debut at age 16. She won the 2010 Jewels -56 kg Rough Stone Grand Prix tournament, becoming one of the youngest female champions in a major MMA promotion.
On August 25, 2012, Mizuki became the 2012 Shoot Boxing Girls S-Cup 53.5-kilogram tournament champion.
She repeated this feat on August 3, 2013.
At the weigh-ins, Wu weighed in at 128 Ibs, 3 pounds over the non-title fight limit. Wu was fined 30% of her purse to Mizuki and the bout proceeded at catchweight. Mizuki won the fight via split decision.
In November 2020, Inoue underwent surgery to repair an anterior cruciate ligament injury. Mizuki is looking to get back into the Octagon in summer of 2022.
MMA record: 14-6-0 / height: 5'3" (160 cm) / weight: 116 lbs (52.6 kg)