As of April 2023, Combat Press ranks him as the tenth best super featherweight kickboxer in the world.
[3] Matsuoka extended his win-streak to three fights with a unanimous decision win over the two-weight Wu Lin Feng champion Tie Yinghua at Glory of Heroes 32: Huizhou on July 7, 2018.
[8][9] Riki Matsuoka was scheduled to face Kona Kato at Krush 119 on November 27, 2020.
[10] Matsuoka was disqualified from the bout at the 2:42 minute mark of the second round, after he threw an illegal knee inside the clinch.
The bout was a rematch of their November 27, 2020, fight, which ended in a disqualification win for Kato, due to an illegal clinch knee.
[13] Matsuoka faced Duangsompong Maki in the quarterfinals of the 2021 K-1 Welterweight Grand Prix, held at K-1 World GP 2021: Yokohamatsuri on September 20, 2021.