The 24 year old Japanese fighter is a member of the Shinsei gym, which also features WBC Super Bantamweight champion Hozumi Hasegawa, and began his career in 2012. He first began to make a mark on the sport in 2014 when he claimed the All-Japan Rookie of the Year crown at Super Bantamweight. Since claiming that crown Kawashima's career has struggled for momentum and despite scoring 5 straight wins since claiming his Rookie crown he has yet to really step up in levels. Saying that he has proven himself on the road defeating Jim Wook Lim in Korea.
The 34 year old Mijares is a true veteran having debuted way back in 1997. He struggled at times early in career, losing 3 of his first 15 bouts, but later went on to be one of the lower weight stars. That star status was helped by a 6 year and 26 fight unbeaten run. During that run Mijares went on to defeat the likes of Katsushige Kawashima, Jorge Arce, Teppei Kikui, Jose Navarro, Alexander Munoz and Chatchai Sasakul. Sadly for Mijares that winning run came to and ended and he suffered a series of losses in 2008-2009.
In recent years Mijares has had going 18-2. His last win saw him upset Andres Gutierrez to claim the WBC Silver Featherweight title, which he will be defending against Kawashima.
Strangely Kawashima isn't ranked at all by the WBC, leaving serious questions at to why they are sanctioning this bout.