2AM (Korean: 투에이엠) is a South Korean boy group, that consists of Jo Kwon, Lee Changmin, Lim Seulong and Jeong Jinwoon. It was one of the two subgroups split from the eleven-member boy band One Day, the other being 2PM. They officially debuted on July 11, 2008, on KBS's Music Bank, performing the song "This Song". They won their first Mutizen at Inkigayo on February 7, 2010, with "Can't Let You Go Even If I Die".

Formation

Along with the members of 2PM, 2AM's Seulong, Jokwon, Jinwoon appeared on the documentary Hot Blood that was aired on Mnet, documented their rigorous training program on their pre-debut days. Changmin was not in the documentary because he had not joined JYPE. Initially, Jinwoon was eliminated on Hot Blood, but he ended up in 2AM due to Daehun's withdrawal from JYPE.

History

2008–2010: Debut and early years

2AM's first single, "이 노래 (This Song)", was released on July 21, 2008.[3] It was followed a year later by "Time For Confession", on March 19, 2009, with "친구의 고백 (Confession of a Friend)". In January 2010 the band released the EP, "죽어도 못 보내" with "죽어도 못 보내 (Even If I Die I Can't Let You Go)" as the lead track. The EP featured four additional songs, three from their first and second singles and one new song titled "잘못했어 (I Was Wrong)", which was their promoted track. Through June and July 2010, 2AM opened for Wonder Girls on the second leg of their Wonder Girls World Tour. They are also featured in Made in Wonder Girls. On October 26, 2010, 2AM released their first full-length album entitled Saint o'Clock, with "전활 받지 않는 너에게 (You Wouldn't Answer My Calls)" and "미친 듯이 (Like Crazy)" as the lead tracks.

2011–2012: Asian career

Following the Korean success of their 2010 album Saint o'Clock, the band released a Japanese version on November 9, 2011. On January 2012, they released their first Japanese single "Never Let You Go: Shindemo Hanasanai", a Japanese version of the band's Korean single, "Even if I Die, I Can't Let You Go (죽어도 못보내)." It successfully entered both Oricon Daily Chart and Weekly Chart in the top 3. They released their second Korean EP F.Scott Fitzgerald's Way Of Love and released the music video for the lead track of the album, "I Wonder If You Hurt Like Me". In January 2012 they toured Japan, becoming the first K-Pop idol group to perform at Tokyo Bunkamura Orchard Hall.

The band followed up with the release of their second Japanese single "Denwa ni Denai Kimi ni (You Wouldn't Answer My Calls)" in Japan on April 11. The song immediately debuted on Oricon Daily charts at fourth place. The release included the Japanese version of "You Wouldn’t Answer My Calls" and a cover Ken Hirai‘s "瞳をとじて (Close Your Eyes)."

In April 2012, 2PM and 2AM announced the release of the documentary film known as Beyond The One Day, in Japan. One Day refers to the group from which 2PM and 2AM both split. On April 13, they released the trailer for the film. This was followed up with the release of Japanese single for the theme song "One day". In September 2012, 2AM released the third Japanese single For You: Kimi no Tame ni Dekiru Koto" their first original in Japanese. The title track "For You~君のためにできること~" was selected as the theme song for Japanese TBS drama NEO Soumatou Company which premiered on July 16. In the same year, 2AM held their first Asia concert tour, visiting Hong Kong, Taiwan, Japan and Malaysia. They recorded a Chinese version of the song "I Wonder If You Hurt Like Me (好痛) while Jokwon expressed some concerns about his pronunciation. It featured on the Asian version of their second EP F. Scott Fitzgerald's Way Of Love. In November 2012, prior to the concert in Japan, Seulong fractured a toe and performed in a wheelchair. The 4th Japanese single "Darenimo Watasenai Yo" was released in Japan on December 5, 2012.

2013–present: One Spring Day and hiatus

2AM released their first full-length Japan Album titled Voice on January 9, 2013. The album collected the tracks from their Japanese singles released to date and included four new songs; "First Love", "Pretty Girl", "愛の歌がRadioから", "無邪気な笑顔で" and Japanese version of "I Wonder If You Hurt Like Me~君も僕のように." On March 5, 2013, 2AM released their second full-length album, One Spring Day. The album, containing 9 tracks, is a collaboration with many artists, including pianist & composer Yiruma and Eptione Project. They also hosted SNL Korea on April 13, 2013. The band released their second EP, Nocturne, on November 19, 2013. The EP included 5 tracks. Due to member Jung Jinwoon's injury, 2AM did not promote the album on music programs.

Members Seulong, Jo Kwon, and Jinwoon all officially switched their contracts back to JYP Entertainment after their contracts with Big Hit Entertainment expired in April, while Changmin stayed with Big Hit due to his involvement with Homme. A new album, Let's Talk would be the first under JYP Entertainment, after releasing their previous albums with Big Hit Entertainment. Producer Park Jin Young composed several of the tracks, while the title song "Over The Destiny" was written for the group by Cho Kyumin. Days Like Today was released on October 27, followed by "Over The Destiny" on October 30, 2014.

In March 2015 Seulong and Jinwoon decided not to renew their contracts with JYP Entertainment and would sign to other agencies. While Changmin ended his contract in August 2015, JYP Entertainment assured that the departures did not mean 2AM was breaking up. On September 22, 2017, Jo Kwon parted ways with JYP Entertainment. He stated that, despite his departure from JYP Entertainment, 2AM had not disbanded and that the other members had clauses in their individual contracts which would allow them to promote as 2AM in the future.- Wikipedia