On June 20, 1979, Masashi Kudo and Manuel Ricardo Gonzalez met again in an immediate rematch.
Kudo came in to the fight on a 22-fight win streak with a 50% KO rate, and was fighting after a gap of 1 month and 6 days.
In the rematch, Masashi Kudo stopped Manuel Ricardo Gonzalez via TKO in the 12th round of the 15-round world-title fight, and successfully defended his WBA and The Ring super-welterweight titles. Kudo improves his record to 23-0 (12 KOs)
On August 9, 1978, a 26-year-old Masashi Kudo (19-0, 11 KOs) got a shot at the WBA and The Ring super-welterweight titles held by 27-year-old Nicaraguan boxer Eddie Gazo (34-4-2, 18 KOs).
Kudo came in to the fight on a 19-fight win streak with a 57% KO rate, and was fighting after a gap of 3 months and 7 days. Gazo was on a 8-fight win streak with a 45% KO rate, and fighting after a layoff of 7 months and 22 days.
Masashi Kudo defeated Eddie Gazo via split decision and wins the WBA and The Ring titles — in his first world-title fight. Kudo improves his record to 20-0, while Gazo adds a loss to his record at 34-5-2.
On May 14, 1979, the 27-year-old WBA and The Ring super-welterweight world champion, Masashi Kudo (21-0, 11 KOs), faced Manuel Ricardo Gonzalez, in a title defense fight.
Kudo came in to the fight on a 21-fight win streak with a 52% KO rate, and was fighting after a gap of 5 months and 1 day.
Masashi Kudo defeated Manuel Ricardo Gonzalez via majority decision and successfully defended his WBA and The Ring super-welterweight titles. Kudo improves his record to 22-0
On December 13, 1978, the 27-year-old WBA and The Ring super-welterweight world champion, Masashi Kudo (20-0, 11 KOs), faced Ho Joo, in a title defense fight.
Kudo came in to the fight on a 20-fight win streak with a 55% KO rate, and was fighting after a gap of 4 months and 4 days.
Masashi Kudo defeated Ho Joo via split decision and successfully defended his WBA and The Ring super-welterweight titles. Kudo improves his record to 21-0
On November 30, 1975, a 24-year-old Masashi Kudo (8-0, 4 KOs) and Yuji Miyagoshi met in the ring for the 2nd time, in a middleweight bout.
Kudo came in to the fight on a 8-fight win streak with a 50% KO rate, and was fighting after a gap of 4 months and 12 days.
In the rematch, Masashi Kudo defeated Yuji Miyagoshi via unanimous decision in the 10-round middleweight fight. Kudo improves his record to 9-0
On June 27, 1976, a 24-year-old Masashi Kudo (11-0, 6 KOs) and Yuichiro Watanabe met in the ring in a middleweight bout.
Kudo came in to the fight on a 11-fight win streak with a 54% KO rate, and was fighting after a gap of 2 months and 30 days.
Masashi Kudo stopped Yuichiro Watanabe via KO in the 3rd round. Kudo improves his record to 12-0 (7 KOs)
On January 27, 1976, a 24-year-old Masashi Kudo (9-0, 4 KOs) and Takeshi Izumi met in the ring in a middleweight bout.
Kudo came in to the fight on a 9-fight win streak with a 44% KO rate, and was fighting after a gap of 1 month and 28 days.
Masashi Kudo stopped Takeshi Izumi via KO in the 4th round. Kudo improves his record to 10-0 (5 KOs)
On October 24, 1979, the 28-year-old WBA and The Ring super-welterweight world champion, Masashi Kudo (23-0, 12 KOs), faced a 25-year-old Ugandan boxer Ayub Kalule (30-0, 17 KOs), in a title defense fight.
Kudo came in to the fight on a 23-fight win streak with a 52% KO rate, and was fighting after a gap of 4 months and 4 days. Kalule was on a 30-fight win streak with a 56% KO rate, and fighting after a layoff of 1 month and 18 days.
Ayub Kalule defeated Masashi Kudo via unanimous decision and wins the WBA and The Ring titles — in his first world-title fight. Kalule improves his record to 31-0, while Kudo adds a loss to his record at 23-1.
On March 28, 1976, a 24-year-old Masashi Kudo (10-0, 5 KOs) and Saburo Sakai met in the ring.
Kudo came in to the fight on a 10-fight win streak with a 50% KO rate, and was fighting after a gap of 2 months and 1 day.
Masashi Kudo stopped Saburo Sakai via KO in the 1st round. Kudo improves his record to 11-0 (6 KOs)
On October 31, 1977, a 26-year-old Masashi Kudo (17-0, 10 KOs) and Katsuo Esashi met in the ring.
Kudo came in to the fight on a 17-fight win streak with a 58% KO rate, and was fighting after a gap of 1 month and 25 days.
Masashi Kudo stopped Katsuo Esashi via RTD in the 3rd round. Kudo improves his record to 18-0 (11 KOs)