He notably composed the score of critically acclaimed works: the 2019 Academy Award-winning film Parasite, directed by Bong Joon-ho,[2] and the television series Squid Game, which he earned a nomination for Outstanding Original Main Title Theme Music in 74th Primetime Creative Arts Emmy Awards.

He was three when he first sat on a piano, played the guitar at nine, and at age 13, he posted an ad on a music magazine called Hot Music[3] "to find bass drums and vocals to do a style of music that is similar to the British heavy metalband Carcass.

[1] He debuted as the bassist of the band gigs (which Jung Won-yong [ko], vocalist Lee Juck and guitarist Han Sang-won [ko] were also part of) in November 1999.

[5][6] He released his first solo album "tear flower(눈물꽃)" in 2003.

[9] In 2021, he won the Hollywood Music in Media Awards for Best Score in a TV Show for Squid Game.