On March 13, 2025, the 29-year-old WBA flyweight champion, Seigo Yuri Akui (21-2-1, 11 KOs), and the 33-year-old WBC flyweight champion Kenshiro Teraji (24-1, 15 KOs) met in a title-unification fight.
Akui came in to the fight on a 9-fight win streak with a 45% KO rate, and was fighting after a gap of 5 months. Teraji was on a 6-fight win streak with a 60% KO rate, and fighting after a layoff of 5 months.
Kenshiro Teraji stopped Seigo Yuri Akui via TKO in the final round of the 12-round world-title fight and unified the WBA and WBC flyweight titles. Teraji improves his record to 25-1 (16 KOs), while Akui adds a loss to his record at 21-3-1.
On October 28, 2018, a 23-year-old Seigo Yuri Akui (12-1-1, 8 KOs) and Jaysever Abcede met in the ring.
Akui came in to the fight on a 1-fight win streak with a 57% KO rate, and was fighting after a gap of 6 months and 20 days.
Seigo Yuri Akui lost to Jaysever Abcede via TKO in the 8th round, and adds a loss to his record at 12-2-1.
On August 23, 2017, a 21-year-old Seigo Yuri Akui (11-0-1, 7 KOs) and a 19-year-old fellow Japanese boxer Junto Nakatani (12-0, 9 KOs) met in the ring in a flyweight bout.
Akui came in to the fight on a 9-fight win streak with a 58% KO rate, and was fighting after a gap of 3 months and 7 days. Nakatani was on a 12-fight win streak with a 75% KO rate, and fighting after a layoff of 3 months and 7 days.
Junto Nakatani stopped Seigo Yuri Akui via TKO in the 6th round. Nakatani improves his record to 13-0 (10 KOs), while Akui adds a loss to his record at 11-1-1.