On February 10, 1993, the 27-year-old WBA (Regular) strawweight world champion, Hideyuki Ohashi (19-4, 12 KOs), faced Chana Porpaoin, in a title defense fight.
Ohashi came in to the fight on a 5-fight win streak with a 52% KO rate, and was fighting after a gap of 3 months and 27 days.
Hideyuki Ohashi was defending his strawweight WBA (Regular) titles against Chana Porpaoin and lost via majority decision in the 12-round strawweight fight, and adds a loss to his record at 19-5.
On October 25, 1990, the 25-year-old WBC strawweight world champion, Hideyuki Ohashi (14-3, 9 KOs), faced a 24-year-old Mexican boxer Ricardo Lopez (26-0, 19 KOs), in a title defense fight.
Ohashi came in to the fight on a 6-fight win streak with a 52% KO rate, and was fighting after a gap of 4 months and 17 days. López was on a 26-fight win streak with a 73% KO rate, and fighting after a layoff of 3 months and 26 days.
Ricardo López stopped the champion via TKO in the 5th round of the 12-round world-title fight, winning the first world title of his career, and is crowned the new WBC strawweight champion. López improves his record to 27-0 (20 KOs), while Ohashi adds a loss to his record at 14-4.
On June 27, 1988, Hideyuki Ohashi and Jung Koo Chang met again in a rematch.
Ohashi came in to the fight on a 3-fight win streak with a 40% KO rate, and was fighting after a gap of 5 months and 16 days.
Hideyuki Ohashi was defending his light-flyweight titles and, fighting for the light-flyweight WBC titles against Jung Koo Chang and lost via TKO in the 8th round, and adds a loss to his record at 8-3.
On December 14, 1986, a 21-year-old Hideyuki Ohashi (5-1, 3 KOs) got a shot at the light-flyweight WBC title held by Jung Koo Chang.
Ohashi came in to the fight on a 1-fight win streak with a 50% KO rate, and was fighting after a gap of 5 months and 21 days.
Hideyuki Ohashi was defending his light-flyweight titles and, fighting for the light-flyweight WBC titles against Jung Koo Chang and lost via TKO in the 5th round, and adds a loss to his record at 5-2.
On March 20, 1986, a 21-year-old Hideyuki Ohashi (4-0, 3 KOs) and Bong Jun Kim met in the ring.
Ohashi came in to the fight on a 4-fight win streak with a 75% KO rate, and was fighting after a gap of 3 months and 17 days.
Hideyuki Ohashi lost to Bong Jun Kim via points decision in the 10-round fight, and adds a loss to his record at 4-1.