Igarashi defeated Mexico's Wilbert Uicab in the WBC flyweight title eliminator via a unanimous decision at the Yoyogi National Stadium Second Gymnasium on November 6, 2011 [REF].
On July 16, 2012, Igarashi barely outpointed Sonny Boy Jaro via a split decision to win the WBC, The Ring and lineal flyweight titles in Kasukabe, Saitama [REF].