Hiroki Ioka has eight losses against seven opponents on his boxing record. For a list of Ioka's best fights, refer to "Best fights of Hiroki Ioka".
On December 19, 1998 Hiroki Ioka faced off against Masamori Tokuyama at age 29. He was coming in with a record of 33-8-1 (17), and Tokuyama was 24 years old and with a record of 15-2-1 (3). Ioka lost the fight via 5th-round TKO.
On April 29, 1998 Hiroki Ioka fought Satoshi Iida in a super-flyweight world-title fight for Iida's WBA title. Ioka was 29 years old and with a record of 32-7-1 (17). Ioka lost the fight via 12-round majority decision.
On February 25, 1997 Hiroki Ioka fought José Bonilla in a flyweight world-title fight for Bonilla's WBA title. Ioka was 28 years old and with a record of 30-6-1 (16). Ioka lost the fight via 7th-round TKO.
On October 17, 1995 Hiroki Ioka fought Saen Sor Ploenchit in a flyweight world-title fight for Ploenchit's WBA title. Ioka was 26 years old and with a record of 27-5-1 (14). Ioka lost the fight via 10th-round TKO.
On June 21, 1993 Hiroki Ioka fought David Griman in a flyweight world-title fight for Griman's WBA title. Ioka was 24 years old and with a record of 22-4-1 (10). Ioka lost the fight via 8th-round TKO.
On November 18, 1992 Hiroki Ioka met Yuh Myung-Woo in a light-flyweight (WBA) world-title defense fight. Ioka was 23 years old and with a record of 21-3-1 (9), and Myung-Woo was 28 years old and with a record of 36-1 (14). Ioka lost the fight via 12-round majority decision and lost the title.
On June 10, 1989 Hiroki Ioka fought Napa Kiatwanchai in a strawweight world-title fight for Kiatwanchai's WBC title. Ioka was 20 years old and with a record of 11-2-1 (7). Ioka lost the fight via 11th-round TKO.
On November 13, 1988 Hiroki Ioka met Napa Kiatwanchai in a strawweight (WBC) world-title defense fight. Ioka was 19 years old and with a record of 10-1-1 (6). Ioka lost the fight via 12-round majority decision and lost the title.
