The bout, screened live on Canal 4 in Nicaragua, saw Buitrago starting well, applying his pressure and taking the fight to he challenger. Buitrago, to his credit, fought back but seemed unable to ever get Kyoguichi's respect with the champion closing the space the space between the two very easily. At close range Buitrago had some success, but lacked the power to do the damage that the champion was doing, as he began to chip away at the challenger with heavy hooks and uppercuts.
By round 4 Buitrago was clearly showing signs of slowing down, his eyes swelling and his output dropping whilst Kyoguchi was looking like a steam train, coming forward no matter what was being thrown in his direction. The pressure continued to tell and round by round Buitrago was becoming more and more negative, backing up on to the ropes and throwing “stay away” punches, rather than anything with serious intent.
By the end of round 6 it began to look like the referee was looking for a chance to stop the bout, but every time it seemed like he was going to Buitrago would have a spurt of action, throw back and make Kyoguchi momentarily back off. It wasn't that the challenger could ever hurt the champion, even clean right hands seemed to bounce off him, but it was enough to show life to the referee.
Sadly for Buitrago that fight just left him taking more punishment and in round 8, after several shots snapped his head back, the referee stepped in for the mercy stoppage. Buitrago was still throwing back at the time, but it was a stoppage that few would have complained with.
Having only debuted in April 2016 Kyoguchi's rise to champion has been incredible. This year he has gone 4-0 (2) claimed a regional and world title, defending both belts once, and has been one of the unheralded stars of 2017. He has answered questions regarding his chin, stamina and ability and in 2018 he's going to be a monster of a champion, who perhaps has his eyes on winning a title at 108lbs or unification.
For Buitrago the bout is a clear sign that he needs to give up fighting at Minmumweight. He had had persistent rumours about weight struggles coming in to the bout and now needs to move up and try to resurrect his career at Light Flyweight, before taking too many beatings like this.