Following the success of his debut, Rain released his second album, Rain 2 with the lead single "Ways to Avoid the Sun".
From 2003-2004, he became a host for KBS's Music Bank.
Rain released his first Japanese album, Eternal Rain on September 13, 2006.
In 2002, Jung debuted as a solo singer with his first solo album titled Bad Guy where he was introduced to the media through his stage name, Rain.
Two singles were released from the album - the eponymous title track "Bad Guy" and "Handshake".
The concert was marketed and promoted by the Asian concert production company Rainstone Live.
On October 16, 2008, Rain released his fifth Korean album, Rainism, which spawned the number one hit single "Love Story".
Rain made his acting debut in the 2003 drama Sang Doo! His lead role in the pan-Asia hit drama Full House (2004) established his status as a Hallyu star. In a CNN interview and also in a Discovery Channel documentary called Discovering Hip Korea, he recalled being repeatedly rejected because of his looks: "In fact, I was told after one audition that my singing and dancing was great but I did not make it because I did not have double eyelids." He was eventually recruited into JYP Entertainment, as Park Jin-young saw his drive and persistence.
In 2008, Rain made his Hollywood debut in the film Speed Racer and starred in Ninja Assassin (2009), the latter of which made him the first Korean to win an MTV award. During his early years of training, Rain was a backup dancer.
The music video for "Love Story" featured Korean actress Ha Ji-won.
A second single, titled "Rainisim", was subsequently released.
"One of the 'problems' that Alex brought up was, "I think Rain is lying about dating Kim Tae Hee.
Rain and I are so close that we meet up at least once or twice every week, but I've never seen her.
This was followed up by the release of his fourth album, Rain's World, which also sold over a million copies in Asia and further established him as one of the top musical acts in Southeast Asia.