Osawa was ranked # 1 by the WBO .
Valdez made his first title defense against 31 year old Japanese boxer Hiroshige Osawa ( 30 -- 3 -- 4 , 19 KOs ) on the undercard of Pacquiao - Vargas PPV bout on November 5 , 2016 .
Hiroshige Osawa was ranked # 1 by the WBO .
Valdez made his first title defense against 31 year old Japanese boxer Hiroshige Osawa ( 30 -- 3 -- 4 , 19 KOs ) on the undercard of Pacquiao - Vargas PPV bout on November 5 , 2016 .