Park Yoo-chun

In 2003, Park returned to South Korea after he was scouted by Brothers Entertainment. He was later signed as an artist by S.M. Entertainment.[5]

From 2003 to 2009, Park performed as a member of the best-selling K-pop boy band TVXQ. In July 2009, Park and two of his TVXQ bandmates, Jaejoong and Junsu, filed a lawsuit against their South Korean agency S.M. Entertainment. Through their lawyers, the members stated that the 13-year contract was excessively long, schedules were held out without the confirmation or permission of the members, contract terms have been extended and changed without their knowledge or consent and that the group's earnings were not fairly distributed to the members. After TVXQ's Japanese label announced a group hiatus in early 2010, they formed a new three-member group initially known as JUNSU/JAEJOONG/YUCHUN in Japan.

On November 28, 2012, the legal battle between JYJ and S.M. finally ended. Both sides agreed to retiring every judicial accusation against each other and not interfering in each other's actions.

JYJ in 2014 Asian Games opening ceremony

In September 2010, JYJ released extended play The..., which debuted at number one on Japan's Oricon album charts.[6] However, Avex had announced the suspension and when in Japan, the same month that year.[7]

JYJ proceeded to release The Beginning, a global album which was sung in English. JYJ promoted the new album via a worldwide showcase tour throughout October and November with dates in South Korea, Southeast Asia and the United States.
On January 25, 2011, JYJ released Korean extended play Their Rooms "Our Story"." JYJ's second group album and first full-length Korean-language album In Heaven was released September 28, 2011.

Starting from April, Park toured Asia and North America for JYJ's first Worldwide Tour.[8] The tour was then extended to Europe and South America, adding another four stops in Spain, Germany, Chile and Peru.

Park is featured in "Tokyo Lovelight" from DJ Makai's mini-album, Stars. He was also one of the featured rappers on the song "Heartquake", a track from Super Junior's third album, Sorry, Sorry.[9]

For Miss Ripley, Park sang "너를 위한 빈자리 (The Empty Space for You)". It appeared in the ninth episode of the drama and was released on the Miss Ripley OST (Part 3).

Park has written and composed several songs that have appeared on TVXQ's Korean and Japanese albums. As a member of SM Town, he contributed to the 2007 winter album Only Love with his composition "Evergreen". Park also wrote and composed "사랑 안녕 사랑 (Love Bye Love)", featured on the group's fourth Korean studio album Mirotic.[10] For the Trick project, he wrote the lyrics to his solo "My Girlfriend", entirely in English.[11]

"Kiss the Baby Sky", one of the A-side's for TVXQ's twenty-fifth Japanese single, marked the first time that one of the songs both written and composed by Park was released on a Japanese single.[12]

With TVXQ members U-Know Yunho and Xiah Junsu, Park wrote the rap lyrics to "Love After Love", which appeared on their second Korean studio album, Rising Sun. For the group's Japanese releases, Park wrote and co-composed "Kiss Shita Mama, Sayonara" (Kissしたまま、さよなら, lit. As We Kiss, Goodbye) with Hero Jaejoong (Kim Jaejoong) for T, TVXQ's third Japanese album.[13] In September 2009, he and Hero Jaejoong (Kim Jaejoong) released a self-written duet, "Colors (Melody and Harmony)/Shelter", which was used as the image song for Hello Kitty's 35th anniversary.[14]

Park has also written songs for JYJ's albums. "I Love You", a track featured in JYJ's 2010 album The Beginning, was penned by Park. In January 2011, Park was the lyricist/composer in JYJ's music essay called Their Rooms "Our Story" for the song "이름없는 노래 Part 1 (A Song Without A Name, Part 1)". In addition, he also composed the rap in bandmate Junsu's song, "Xiahtic". For In Heaven, Park co-wrote "Get Out" with bandmate Kim Jaejoong.

Park confirmed to hold a fan meeting and mini concert titled "Reunion: Remember the Memories" on March 10 and 11, 2018 as his first public appearance after being discharged as a public service worker.[15][16]

Park released his first studio album, Slow Dance, on February 27, 2019.[17] Park had his first solo concert in Seoul on March 2, 2019, called 'Slow Dance in Seoul'[18]

Park's Slow Dance concert tour in Japan began in March 2019.[19]

He announced his retirement from the entertainment industry in April 2019, following his arrest on suspicion of illegal drug use and the termination of his contract with his agency.[20]

Park held a charity fanmeeting for the LOVE ASIA foundation in Bangkok, Thailand on January 25, 2020.[21]

On July 31, 2020, it was announced that Park was working on a new album, which would be followed by a fan signing and mini concert in Thailand.[22] The album, RE:mind, was released on 19 November 2020 through various music sites. It contains seven tracks: "THE CRY", "Station", "Carousel", "WHAT U WAITING FOR", "SOMEBODY TO LOVE ME", recorded in English, and "SEE YOU AGAIN", recorded in Japanese and Thai.[23]

After his departure from C-JeS Entertainment, Park Yoochun continued his solo activities through the agency The Number Nine which manages his activities in Thailand [24] in cooperation with the label Re:Cielo and Yesperar which was granted exclusive management rights of the artist by Re:Cielo until July 2021.[25] Since October 2021, Park is active under a new agency, Logbook Entertainment.[26]

In April 2017, it was confirmed by Park's agency that he was engaged to Namyang Dairy Products heiress, Hwang Ha-na.[35][36] On May 15, 2018, the couple was reported to have ended their relationship.[37][38]

In 2016 and 2017, Yoo-chun was accused by four different women of sexual assault, but was acquitted after the police ruled it was difficult to prove the use of force, making the charges invalid.[39] The case was later forwarded to Seoul Central District Prosecutors Office and he was also cleared of all sexual assault charges.[40] One of Yoo-chun's accusers was ruled to have falsified the charges, and was sentenced to two years in prison.[41] In 2017, another one of Yoo-chun's accusers ("A") was found to be not guilty of false accusations and defamation. The prosecutor of this defamation case attempted to appeal this decision but the appeal was denied.[42][43] In 2018, "A" filed for a civil suit for damages against Yoo-chun for 100 million won in compensation and requested for his officetel to be seized.[44] The court has ordered to settle their suit through mandatory mediation with the Seoul Court Mediation Center [45] ruling in July 2019 that Yoo-chun should pay "A" 50 million won instead. Because Park Yoo-Chun did not send his objection to the proposal within the given two weeks deadline the terms are accepted by default and solidified the amount he must compensate.[46] Yoo-chun initially failed to pay the compensation, and was brought to a detention judgement trial in 2020. During the trial, Yoo-chun was given a "non-punishment" ruling, meaning "the punishment is unfair or that the debtor proved that he was meeting his obligations by the date of the trial".[47] In February 2021, it was announced that Yoo-chun had paid the compensation in full.[48]

On August 18, 2021, it was reported in a Japanese news article that Park had signed with a new agency due to his former agency (Re:Cielo) having "barely paid" him during his two years with the company, and claimed the company had embezzled funds. In response, Re:Cielo announced that Park's statements were entirely false and that they were preparing a civil damages lawsuit against him due to his breach of contract and defamation of the company.[49] On August 27, 2021, another agency Yespera Co., Ltd revealed that Re:Cielo signed an exclusive contract that grants Yespera exclusive management rights of Park Yoochun with permission from the artist. For this reason, they filed an injuction against his broadcast and entertainment activities stating there was no reason to terminate his contract.[50] On November 10, 2021, Park was temporarily banned from appearing on TV and continuing any activities in the entertainment industry (unless the activities were with Yespera but no mention of Re:Cielo) by the Seoul Central District Court.[51][52][53]

On April 26, 2019, Park was arrested on suspicion of purchasing and using methamphetamine. He was also suspected of attempting to destroy evidence by dyeing and shaving the hair from his body before undergoing the drug test. Park's agency, C-JeS Entertainment, announced that his contract would be terminated and that he would retire from the industry.[54] According to news reports, Park admitted the drug charges against him after initially having repeatedly denied the accusations.[55][56] On July 2, 2019, Park was sentenced to ten months imprisonment, suspended for two years and a fine of 1.4 million won.[57] He has since completed his probation without violations.[58]