In 2012, Jihoo debuted under DSP Media in the boy group A-JAX. During his 4 years with DSP Media, Jihoo not only promoted as a singer but also took part in acting through web drama 'Vampire's Flower' and more. 

9 months after Jihoo's departure from A-JAX, WS Entertainment announced that they have signed with Jihoo and stated, "Moon Jihoo has multiple talents and he's an actor who gives great effort. We believe he still has more hidden talent to show. Moon Jihoo will grow as an actor one step by step and he, too, will use the contract with us as his foundation for more active promotions. We will show a good side of him from now on so please look after him with attention and affection."

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Good luck to Jihoo on his fresh, new start!