Watanabe Mika (渡邉美香), known before by her maiden name Izumi Mika, is a jazz dance instructor and one-time KUNOICHI All-Star. She showed considerable potential in both SASUKE and KUNOICHI.In her first SASUKE competition, SASUKE 12, she failed the Jump Hang. However, in the SASUKE 13 Trials, she cleared the Jump Hang and even made it to the top of the Soritatsu Kabe in one try. However, her time ran out as she was climbing over the top of the wall. At SASUKE 13, she was given #96 (The highest number given to a female competitor in SASUKE) as she showed potential of becoming the second woman to clear the First Stage (with the first being Tanabe Chie11 competitions ago). However, she shocked everyone by failing the Prism See-Saw.
Watanabe (then Izumi) also competed in four KUNOICHI competitions. In her first tournament, KUNOICHI 3, she made it all the way to the Final Stage, but ultimately fell about one second short of kanzenseiha. She returned for KUNOICHI 4 but hurried through the Sarentobi in the Second Stage and lost her balance on the final beam. She also competed in KUNOICHI 9. She managed to perform well during the RED Stage (First Stage) but unfortunately timed out at the last obstacle, Cannonball. She then competed again in KUNOICHI 10, where she cleared the RED Stage, but she timed out on the Reverse Conveyor in the BLUE Stage (Second Stage).