Tongyeong may have been unlikely place for a major international competition, but the main stakeholders (Gyeongnam Province, thus the name; Tongyeong City; and MBC Television) worked hard to develop the competition further. Following two successful editions in 2003 and 2004, the foundation applied for membership in the World Federation of international Music Competitions in Geneva (WFIMC) and became their first Korean member in 2006. Besides the cello discipline, which was considered imperative since Isang Yun himself was a cellist, the competition would now offer cello, violin and piano on an annual rotation. Further categories were considered over the years, but cello, violin and piano seemed to provide the best balance between relevance, popularity and available repertoire.
To give greater emphasis on the name Isang Yun, the competition was renamed ISANGYUN Competition in 2008 with the consent of the Yun family. A further milestone contributing greatly to the competition´s popularity was an announcement in 2013: the possibility of duty exemption for military services from the Korean Ministry of Culture, Sports and Tourism, offered for male winners of the top two prizes that held Korean nationality.
With the opening of the new Tongyeong Concert Hall in 2014, the ISANGYUN Competition finally had the world-class venue it deserved. Along with the international setup of the Tongyeong Festival Orchestra during the Final rounds (before it had been the Changwon Philharmonic), the competition could now offer a world-class venue, reknown juries of the highest caliber, and rewards and engagements that still are unparalleled in Korea.