Here is a list of Akui's best fights. For a list of Akui's losses, refer to "Seigo Yuri Akui Losses".
On January 23, 2024 Seigo Yuri Akui fought Artem Dalakian in a flyweight world-title fight for Dalakian's WBA title. Akui was 28 years old and with a record of 19-2-1 (11), and Dalakian was 36 years old and with a record of 22-0 (15). Akui won the fight via 12-round unanimous decision and is crowned the new flyweight world champion.
On October 13, 2024 Seigo Yuri Akui met Thananchai Charunphak in a flyweight (WBA) world-title defense fight. Akui was 29 years old and with a record of 21-2-1 (11), and Charunphak was 24 years old and with a record of 25-1 (15). Akui won the fight via 12-round split decision and successfully defended his title.
On May 6, 2024 Seigo Yuri Akui met Taku Kuwahara in a flyweight (WBA) world-title defense fight. Akui was 28 years old and with a record of 20-2-1 (11), and Kuwahara was 29 years old and with a record of 13-1 (8). Akui won the fight via 12-round unanimous decision and successfully defended his title.
On October 27, 2019 Seigo Yuri Akui faced off against Shun Kosaka in a flyweight bout at age 24. He was coming in with a record of 14-2-1 (10). Akui stopped Shun Kosaka via TKO.
On July 21, 2021 Seigo Yuri Akui faced off against Taku Kuwahara in a flyweight bout at age 25. He was coming in with a record of 16-2-1 (11), and Kuwahara was 26 years old and with a record of 8-0 (4). Akui stopped Taku Kuwahara via TKO.