A 13th fight has been added to next month's UFC 166 card.
Horiguchi, the now-former Shooto 132-pound champion, enters his UFC debut on a five-fight winning streak. The 22-year-old has never had a pro MMA fight outside of Tokyo, Japan.
UFC 166, headlined by Cain Velasquez vs. Junior dos Santos III for the heavyweight title, will take place at the Toyota Center, home of the Houston Rockets.