[6] Kim has an extensive background in theater, having performed in several plays such as 'Maids', 'Custody Claim' (2015), 'Brother's Night' (2016), 'Wake Up Hamlet', 'The Sky at the Amusement Park is Always', and 'In the Middle of the Sea' in the previous year.

[7] In 2017, Kim played the role of a stalker in the drama Band of Sisters and left a strong impression on viewers.

He also gained recognition for his short but impactful acting in director Lee Eung-bok's Guardian: The Lonely and Great God, where he played a doctor trying to save lives without realizing his own fate.

His breakthrough role came in Mr. Sunshine, where he played Takashi Mori, a Japanese character speaking Korean and English with incredible precision.

He has also gained attention for his performances in commercials, including one for a construction company where he played a newlywed, and one for a hamburger brand where he portrayed a quiet, caring father whose child is sleeping.