Akui totally outclassed Vayson with lopsided scores of 100-90 on all three scorecards.
Vayson dropped to 10-1-1 with five knockouts, while Akui won his sixth straight contest and improved to 18-2-1 with 11 knockouts.
On the other hand, three other Pinoy warriors also lost their respective fights on the same card.
The 24-year-old Vayson recently showed so much promise. He was impressive against world-rated Tibo Monabesa last year but the fight was declared a no-contest after it initially ended in a controversial majority decision win for the Indonesian veteran.
He won the vacant World Boxing Council Asian Boxing Council Continental light flyweight strap with a split decision over Nutlai Lalbiakkima also in 2022.
Kyosuke Takami (3-0, 3 KOs) stopped Reymark Alicaba (8-4, 6 KOs) in the fifth round, Hiyoga Miyata (1-0) had a successful pro debut with a unanimous decision over Ernesto Cagampang (4-3-1, 4 KOs) and Ryusei Matsumoto (1-0, 1 KO) also had an impressive pro debut with a third-round knockout of Erson Trinidad (5-2-1, 3 KOs). (EKA)