On October 10, 1976, a 21-year-old Yoko Gushiken (8-0, 5 KOs) got a shot at the WBA light-flyweight title held by Juan Antonio Guzmán.
Gushiken came in to the fight on a 8-fight win streak with a 62% KO rate, and was fighting after a gap of 2 months and 24 days.
Yoko Gushiken stopped the champion via KO in the 7th round of the 15-round world-title fight, winning the first world title of his career, and is crowned the new WBA light-flyweight champion. Gushiken improves his record to 9-0 (6 KOs)
On June 1, 1980, the 24-year-old WBA light-flyweight world champion, Yoko Gushiken (21-0, 14 KOs), faced Martin Vargas, in a title defense fight.
Gushiken came in to the fight on a 21-fight win streak with a 66% KO rate, and was fighting after a gap of 4 months and 5 days.
Yoko Gushiken stopped Martin Vargas via KO in the 8th round of the 15-round world-title fight, and successfully defended his WBA light-flyweight title. Gushiken improves his record to 22-0 (15 KOs)
On October 15, 1978, the 23-year-old WBA light-flyweight world champion, Yoko Gushiken (15-0, 10 KOs), faced Sang Il Jung, in a title defense fight.
Gushiken came in to the fight on a 15-fight win streak with a 66% KO rate, and was fighting after a gap of 2 months and 1 day.
Yoko Gushiken stopped Sang Il Jung via KO in the 5th round of the 15-round world-title fight, and successfully defended his WBA light-flyweight title. Gushiken improves his record to 16-0 (11 KOs)
On October 9, 1977, the 22-year-old WBA light-flyweight world champion, Yoko Gushiken (11-0, 6 KOs), faced Montsayarm Haw Mahachai, in a title defense fight.
Gushiken came in to the fight on a 11-fight win streak with a 54% KO rate, and was fighting after a gap of 4 months and 17 days.
Yoko Gushiken stopped Montsayarm Haw Mahachai via KO in the 4th round of the 15-round world-title fight, and successfully defended his WBA light-flyweight title. Gushiken improves his record to 12-0 (7 KOs)
On October 28, 1979, the 24-year-old WBA light-flyweight world champion, Yoko Gushiken (19-0, 13 KOs), faced Tito Abella, in a title defense fight.
Gushiken came in to the fight on a 19-fight win streak with a 68% KO rate, and was fighting after a gap of 2 months and 29 days.
Yoko Gushiken stopped Tito Abella via KO in the 7th round of the 15-round world-title fight, and successfully defended his WBA light-flyweight title. Gushiken improves his record to 20-0 (14 KOs)
On April 8, 1979, the 23-year-old WBA light-flyweight world champion, Yoko Gushiken (17-0, 12 KOs), faced Alfonso Lopez, in a title defense fight.
Gushiken came in to the fight on a 17-fight win streak with a 70% KO rate, and was fighting after a gap of 3 months and 1 day.
Yoko Gushiken stopped Alfonso Lopez via KO in the 7th round of the 15-round world-title fight, and successfully defended his WBA light-flyweight title. Gushiken improves his record to 18-0 (13 KOs)
On January 7, 1979, Yoko Gushiken and Rigoberto Marcano met again in a rematch.
Gushiken came in to the fight on a 16-fight win streak with a 68% KO rate, and was fighting after a gap of 2 months and 23 days.
In the rematch, Yoko Gushiken stopped Rigoberto Marcano via KO in the 7th round of the 15-round world-title fight, and successfully defended his WBA light-flyweight title. Gushiken improves his record to 17-0 (12 KOs)
On May 7, 1978, Yoko Gushiken and Jaime Rios met again in a rematch.
Gushiken came in to the fight on a 13-fight win streak with a 61% KO rate, and was fighting after a gap of 3 months and 8 days.
In the rematch, Yoko Gushiken stopped Jaime Rios via KO in the 13th round of the 15-round world-title fight, and successfully defended his WBA light-flyweight title. Gushiken improves his record to 14-0 (9 KOs)
On October 12, 1980, the 25-year-old WBA light-flyweight world champion, Yoko Gushiken (22-0, 15 KOs), faced Pedro Flores, in a title defense fight.
Gushiken came in to the fight on a 22-fight win streak with a 68% KO rate, and was fighting after a gap of 4 months and 11 days.
Yoko Gushiken defeated Pedro Flores via unanimous decision and successfully defended his WBA light-flyweight title. Gushiken improves his record to 23-0
On July 29, 1979, the 24-year-old WBA light-flyweight world champion, Yoko Gushiken (18-0, 13 KOs), faced Rafael Pedroza, in a title defense fight.
Gushiken came in to the fight on a 18-fight win streak with a 72% KO rate, and was fighting after a gap of 3 months and 21 days.
Yoko Gushiken defeated Rafael Pedroza via unanimous decision and successfully defended his WBA light-flyweight title. Gushiken improves his record to 19-0