This bout, from way back in 21st June 2009 was Yaegashi's first title bout following his world title loss to the then WBC champion Eagle Den Junlaphan, in a fight that can be seen here. Although the Junlaphan bout had come some 2 years earlier it had taken Yaegashi some time to recover from his painful facial injury and then it had taken further time to rebuild his confidence and re-earn the opportunity to fight for the national title.
Although he was experienced at the world level Yaegashi was actually less experienced, in terms of fights, that Horikawa and the fight turned out to be a very difficult and close contest with both men believing they had enough. In the end it was Yaegashi who got the narrow decision but few would have complained had Horikawa nicked it by a point or so.
It's amazing to think that following this close fight Yaegashi would become a 2-weight world champion and one of the faces of Japanese boxing but it seems clear that he has really developed his skills and become a much better fighter following this contest.
(Video courtesy of BunchesinPunches)