Kenta Koie is the lead vocalist of Japanese electronicore band Crossfaith. Known for his fierce vocal delivery and charismatic stage presence, Koie has played a pivotal role in shaping Crossfaith's globally recognized blend of metalcore and EDM. His performances are marked by high energy and a commanding vocal range, making him one of the standout figures in Japan's heavy music scene.

Kenta Koie collaborated with ONE OK ROCK on the track Skyfall, released in 2017 as part of a special standalone single. The song features a powerhouse lineup of guest vocalists—Masato Hayakawa (coldrain), MAH (SiM), and Koie himself—each bringing their distinct vocal styles to the explosive performance.

Koie also shared the stage with ONE OK ROCK on several major occasions, including Ozzfest Japan 2015, AIR JAM 2016, and the Ambitions Dome Tour at Tokyo Dome in April 2018, where they performed Skyfall together live. His contribution added raw intensity and genre-defying aggression to the band's collaborative ventures.