Yuh next decisioned future Korean National light flyweight title holder Ha-Shik Lim, then scored his first stoppage win with a second round KO over Little Baguio.
On December 8, 1985, Yuh challenged reigning WBA light flyweight champion Joey Olivo.
Yuh defeated the Mexican-American champion by split decision over 15 rounds to capture his first World Title.
Yuh became the second Korean fighter to hold this title, Hwan Jin Kim had held it briefly in 1981.
Yuh's first title defense came against future WBO light flyweight champion Jose De Jesus.
Future IBF flyweight champion Rodolfo Blanco would fall in 8 rounds in Yuh's 6th defense which took place at Sunin University at Incheon, on September 9, 1987.
Salazar also was responsible for handing 2-time world champion Danny Romero his first loss of his career.
Yuh's next four title defenses came against Jose De Jesus, a split decision over 12 rounds, and stoppage victories over Putt Ohyuthanakom, Udin Baharudin and Katsumi Komiyama.
Yuh defeated former WBA minimum weight champion Leo Gamez by split decision over 12 rounds.
On December 12, 1991, Yuh stepped into the ring as a heavy favorite to make his 18th successful defense against former WBC strawweight champion Hiroki Ioka.
All three judges for this fight, Harold Lederman, Oscar Perez and Phil Newman were from the United States.
On November 18, 1992, Yuh returned to Japan to the same arena where he had lost his title, to reclaim it with a 12 round majority decision over Hiroki Ioka.
With family on hand, Yuh announced his retirement after this fight, leaving his career behind with a record of 38-1 (14 KO's).