10 Dec 1983
Chun Ju-do beats Ken Kasugai via knockout 5/15
Super Flyweight (115 lb)
Chun Ju-do becomes the IBF Super Flyweight world champion
28 Jan 1984
Chun Ju-do beats Prayurasak Muangsurin via knockout 12/15
17 Mar 1984
Chun Ju-do beats Diego De Villa via knockout 1/15
26 May 1984
Chun Ju-do beats Felix Marquez via knockout 6/15
22 Jul 1984
Chun Ju-do beats William Develos via knockout 7/15
6 Jan 1985
Chun Ju-do beats Kwang Koo Park via knockout 15/15
3 May 1985
Elly Pical beats Chun Ju-do via knockout 8/15