Sadly for Den Junlaphan it was also in Japan that he suffered his first professional loss and his only stoppage loss in a major upset to Mexico's limited but tough Isaac Bustos. More disappointing than just losing was the way he lost, being forced to retire after damaging his own arm in round 3. Prior to the injury he appeared to be in control of the fight though you can see him feeling the injury coming on very early in round 3. From then on there was simply too much time in the contest to fight 1-handed.
It's was a very unfortunate way to lose the title but he would later regain the belt to become a 2-time world champion by beating Katsunari Takayama who had taken the belt from Bustos just 4 months after this bout.
*At the time of this fight Den Junlphan was fighting as Eagle Kyowa
(Video thanks to BoxeoAmadeo)