Koichi Wajima

After graduating from middle school, he traveled to Tokyo, where he worked briefly as a truck driver before joining the Misako Boxing Gym. He made his professional debut in March, 1968, at the age of 25.

Wajima captured the Japanese super welterweight title in September, 1969. He defended the title 9 times before returning it. He got his first shot at the world title against Carmelo Bossi for the world light middleweight title on October 31, 1971 in Tokyo, winning by 15-round split decision to capture his first world title. He made his first defense in May, 1972, taking less than 2 minutes to knock out his opponent. He would defend the title a total of 6 times. He quickly became one of the most popular boxers in Japan for his peculiar "Frog Jump" uppercut punch.

He lost his 7th defense to Oscar Albarado in 1974 by KO in the 15th round. He got a rematch with Albarado 7 months later, on January 21, 1975, and managed to avenge his loss with a 15-round decision win to regain the Lineal, WBC and WBA titles. He was stripped of the WBC title in March, and lost to Jae-Doo Yuh to lose his Lineal and WBA light middleweight titles as well. However, he regained his Lineal and WBA titles in February, 1976, with a 15th round KO over Yuh.

Wajima lost to Jose Manuel Duran in his first defense, losing the world title for the third time in his career. He fought his final match In June, 1977, challenging Eddie Gazo for the WBA super welterweight title, but lost by 11th round KO. This was the last fight of his career. His record was 31-6-1 (25KOs).