Park Jae-chan

Park Jae-chan made his name playing a computer science student who lives by the rulebook, and then went home and wrote his own album. In Semantic Error his Choo Sang-woo deletes freeloaders from a group project without blinking. Off screen, the man behind him has writing credits on songs going back to his group’s first year.

Park Jae-chan, known simply as Jaechan, was born on 6 December 2001 in Daegu. He debuted on 24 April 2019 as a member of Dongkiz with the single album Dongkiz on the Block, where he was the group’s rapper. On 7 July 2020 he and fellow member Munik launched the sub-unit Dongkiz I:Kan with the single album Y.O.U, and on 18 March 2022 the group rebranded as DKZ. That same year he entered the Department of Broadcasting and Entertainment at Global Cyber University together with his bandmates.

Acting began in web dramas. He was Kang Heon in Tooniverse’s My YouTube Diary (2019), then took leading roles in No Going Back Romance and YouTuber Class (2020) and I:LOVE:DM (2021). In January 2022 Watcha announced him as Choo Sang-woo opposite Park Seo-ham, and the series premiered that February. The attention around it lifted DKZ’s album sales too. In 2024 he moved to television with Choi Do-hyun in Bitter Sweet Hell, Seo Dong-hee in My Sweet Mobster and Go Soo-ra in Check-in Hanyang.

The solo music arrived on 6 September 2023 with the mini album JC Factory, five songs he composed himself, led by “Hello”. Thirteen days later “Hello” won him his first music show trophy as a soloist on SBS M’s The Show. JC Factory Vol.2 followed on 16 May 2025 with the lead single “Poster Boy”. Between the albums he hosted Station Z on KBS Cool FM from May to August 2022 and It’s A Dream on Naver NOW.