Prior to his debut with Monsta X, Joohoney was part of a project group called Nu Boyz, with #Gun, Shownu, and Wonho, formed under Starship Entertainment in August 2014.

[7][8] In December 2014, Starship Entertainment and Mnet launched a survival program named No.Mercy and Joohoney was selected, along with six other participants (including Shownu and Wonho), as part of the new boy group Monsta X on the last episode of the show.

[11][12] Joohoney alongside group member Kihyun, participated in the soundtrack of the South Korean drama Orange Marmalade titled "Attractable Woman", which was released in May 2015, and produced by Crazy Park and his team.

[41] Starting in late February, Joohoney will be a permanent MC of Mnet's M Countdown, alongside (G)I-dle's Miyeon, as a replacement to Nam Yoon-su.

It is a song about overcoming difficulties by cheering each other on and raising hope, which combines rock and hip hop, and contains a moving theme of turning adversity upside down.

[48] On June 28, Joohoney attended the Chanel's "Codes Couleur" pop-up store opening, held in Seongdong District, Seoul.

[51] Joohoney enlisted for his mandatory military service as an active duty soldier,[52] with 15th Infantry Division at Hwacheon army base in North Gangwon Province on July 24, 2023.

He has produced songs for Monsta X since their debut, including tracks "There's No Exit", "One Love", "Blue Moon", and "GAMBLER", the last being nominated for "Best K-POP" category at the 2021 MTV VMA.

[58] According to Born Champs' CEO Bae Sang-in, there is a significant increase in sales after the selection of Monsta X's Joohoney as their brand model.

[64] In February 2022, he became one of the faces of the Korean cosmetics and skincare brand Olive Young's Vegan Beauty campaign, with his group member Minhyuk and label mate Ive's Liz.

[65] In March, Joohoney became the new face of the Korean street casual brand Born Champs, unveiling its 2022 spring collection through SNS.

[66][67] In January 2023, he participated in the carbonated soft drink brand Mountain Dew's campaign, as part of its collaboration with Starship Entertainment, together with Dynamic Duo's Gaeko and Big Naughty.

[69] He appeared on the cover of the Korean Beauty Magazine's November issue, published by Public News that also spreads Hallyu culture to the world and introduces fashion, beauty, and life that Koreans love, with all the proceeds from its sales be donated to the Korea Social Contribution Association and 100% will be used for the development of Hallyu culture and the underprivileged.