Here is a list of Nishioka's best fights. For a list of Nishioka's losses, refer to "Toshiaki Nishioka Losses".
On October 1, 2011 Toshiaki Nishioka met Rafael Márquez in a super-bantamweight (WBC) world-title defense fight. Nishioka was 35 years old and with a record of 39-4-3 (24), and Márquez was 36 years old and with a record of 40-6 (36). Nishioka won the fight via 12-round unanimous decision and successfully defended his title.
On May 23, 2009 Toshiaki Nishioka met Jhonny González in a super-bantamweight (WBC) world-title defense fight. Nishioka was 32 years old and with a record of 34-4-3 (21), and González was 27 years old and with a record of 40-6 (34). Nishioka stopped Jhonny González via 3rd-round TKO and successfully defended his title.
On December 29, 1998 Toshiaki Nishioka faced off against Jun'ichi Watanabe in a bantamweight bout at age 22. He was coming in with a record of 16-2-1 (9). Nishioka stopped Jun'ichi Watanabe via KO.
