In 2006, while studying at Seoul National University's Department of Composition, Jaehun formed the project ensemble Timirho at the salon Badabi in front of Hongik University, and wrote his own songs based on Western traditional music through his regular 1st album [Timirho] and his 2nd regular album [Fairy Tales]. At the same time as the announcement, he has performed a wide range of compositions and performances that encompass several genres, including working as a member of the indie band Bull Moth Star Sausage Club. Jaehoon Kim, who has collaborated with various artists in the indie scene, including works of Autumn Vacation and Balck Skirt who participated as producers and arrangers, and works with Gonne Choi as a pianist, introduced his music world created by his experiences in November 2019 with minimalism and He started his solo career in earnest by releasing the first solo piano songbook [ACCOMPANIMENT] that was melted with Ambience.

In addition, he started dance music in 2009 with choreographer Jung Young-du's work <Walking>, and since 2016, new works <Crescent Moon>, <Matariki>, National Theater Company, and <Every Different Path> ,The composition and music director of <Sky child, Land child>, and appearing as a music director and performer of <Human Fuga> of Namsan Arts Center x Performing Creation Group Jumpda selected as the play of the year 2019 by the Korean Theater Critics Association. It has been doing a good collaboration. As a producer-type artist, he is contributing to the topography of the domestic art ecosystem as an art director of the residency “Cheopcheopsanjoong”, which was established by reducing the need for a domestic multi-art residency for artist creation.