6 Dec 2000
Keitaro Hoshino beats Joma Gamboa via unanimous decision 12/12
Minimumweight (105 lb)
Keitaro Hoshino becomes the WBA Minimumweight world champion
16 Apr 2001
Chana Porpaoin beats Keitaro Hoshino via split decision 12/12
29 Jan 2002
29 Jul 2002
Noel Arambulet beats Keitaro Hoshino via majority decision 12/12
20 Dec 2002
23 Jun 2003
Jose Antonio Aguirre beats Keitaro Hoshino via knockout 12/12