Kim Jaehan (김재한), or commonly known as Jaehan, is the leader of Korean boy group under IPQ Entertainment, Omega X.

Jaehan started his music career in 2015 as the member of male duo One Voices. He also participated in Produce 101 Season 2 as a trainee from MMO Entertainment but was eliminated in the first round. Later on, Jaehan debuted with Spectrum in 2018, that later disbanded in 2020 due to the company’s worsening condition affected by COVID-19. In 2021, he debuted for the 3rd time as the member of Omega X with VAMOS.