Yōhei Komatsu, better known by his ring name YOH, is a Japanese professional wrestler who debuted on November 19, 2012, and is signed to New Japan Pro-Wrestling (NJPW). After returning from excursion in Mexico, he formed the junior heavyweight tag team Roppongi 3K with SHO, becoming a six-time IWGP Junior Heavyweight Tag Team Champion and winning the Super Junior Tag League in 2017, 2018, 2019, and 2022. He is also a one-time NEVER Openweight 6-Man Tag Team Champion alongside Hirooki Goto and Yoshi-Hashi.

In singles competition, YOH won the Best of the Super Junior tournament in 2026, earning an IWGP Junior Heavyweight Championship match at Dominion 6.14 in Osaka-jo Hall. There, he defeated DOUKI to win the title, ending his 251-day reign and capturing his first IWGP Junior Heavyweight Championship. The Wrestling Observer Newsletter named him Rookie of the Year in 2013, while Pro Wrestling Illustrated ranked Roppongi 3K No. 10 in the PWI Tag Team 50 in 2020 and YOH No. 129 in the PWI 500 in 2025.