The veteran not only set a record for most bouts of an active fighter form Japan, but did so with a win, as he stopped a Thai visitor, we believe to be Mongkol Kamsommat (who would be 6-4, 5 if we're right)*.
The veteran, who is hunting a chance to become a 2-time Japanese champion, looked to box behind his jab early on. In round 3 he suffered a nasty cut over the right eye, from a clash of heads, and would fight the rest of the bout leaking claret. Despite the cut Horikawa fought well in round 4, landing some solid body shots. In round 5 the visitor had some success, but looked like he was only ever willing to commit to a single shot at a time, rather than really let his hands got.
In round 7 Horikawa upped the ante, hurting the visitor before unloading on the Thai and forcing the referee to step in.
After the bout the Japanese fighter seemed to suggest that he had been wanting a swift return, but will now be out of the ring for a while to recover from the cut. He could however return for a title fight towards the end of 2018.
(Image courtesy of boxmob.jp)
*Boxrec currently list Horikawa's opponent as being Suphakit Khampha, who would be 4-6 (1) if it was him.