Jung Hae Won is a South Korean singer, dancer, model, bodybuilder and former member of 3CHONGSA (삼총사), X-5 (엑스파이브) and LU4US (루커스; formerly known as LU:KUS and L.A.U). He graduated from Shinso High School and later obtained a bachelor's degree from Digital Seoul Culture and Arts University. He also lived in Ukraine for 7 years.

He made his debut in May 2009 (under the stage name Sasha) as part of 3CHONGSA with their single "Let's Go". The trio were not able to find much success as their style was never clearly defined, with their debut single being a trot song and their second single being more Pop-oriented. So, Jerry Entertainment (제리엔터테인먼트) decided to disband them in March 2010.

He then re-debuted in April 2011 as part of X-5 (under his real name) with the single "Xenos". However, Open World Entertainment's CEO, Jang Seok Woo, became involved in a major scandal when he was accused and later charged with criminal assault, harassment and rape of his female trainees. After the investigation and sentencing, the agency disappeared, and the group disbanded in December 2012.

He then re-debuted in July 2014 as LU:KUS's rapper, sub-vocalist, composer, arranger, and lyricist (now using the stage name J.One) with their first digital single, "So Into U". The group left PAN Entertainment (팬엔터테인먼트) in 2016 and changed their name to L.A.U due to PAN holding the rights to the name.

He enlisted for his mandatory military service on September 20, 2016, and was discharged on June 24, 2018.

The group re-branded again, this time to LU4US, in January 2019 after signing with JWK Entertainment (JWK엔터테인먼트). However, the group continued to use their original name until late 2020, when they decided to keep the most recent one.

In March 2020, he announced his decision to retire as a singer and is now a model and bodybuilder.

(Source: MyDramaList) Edit Biography