Masaaki Noiri (野杁 正明, Noiri Masaaki, born May 11, 1993) is a Japanese kickboxer, currently competing in the Featherweight Division of ONE Championship. He is a two-weight K-1 champion, having held the K-1 World GP Super Lightweight Championship between 2017 and 2018 and the K-1 World GP Welterweight Championship between 2021 and 2024, as well as a one-time Grand Prix winner, having won the 2021 K-1 World Welterweight Grand Prix.