2008–2010: Debut with 2PM and solo activities In 2008, he participated in
Mnet's
Hot Blood Men, a program that chronicles the rigorous training of thirteen aspiring trainees, all vying for a coveted spot in the boy band
One Day. This initiative ultimately led to the formation of two distinct boy bands, namely
2AM and
2PM. Half a year following the televised airing of
Hot Blood Men, the group
2PM made their debut with the release of their inaugural single
"10 Out of 10" from their first single album titled
Hottest Time of the Day. However, it was their second single album,
2:00PM Time For Change, that propelled them to mainstream success in Korean music, solidifying their meteoric rise. As of 2021, the group has released seven studio albums in Korea and five studio albums in Japan. During a 2PM fan meeting in 2009, he performed his composition "Hot" for the first time for his solo. "Hot" was later recorded by all six members and included on their second studio album
Hands Up (2011). In 2010, he collaborated with composer Jung Woo on the track "Tok Tok Tok" released in August, provided guest vocals for then-labelmate
San E's song "B.U.B.U." (an acronym for "Break Up Back Up"), released in September as part of his first extended play, and collaborated with other idols and singers for the
2010 G20 Seoul summit campaign song "Let's Go," released in October.
2011–2013: Solo debut and theatrical debut On October 7, 2011, Jun. K released his debut single "Alive". The accompanying music video was uploaded to
2PM's official YouTube channel three days later. The song quickly climbed the charts and became number one on
Cyworld. On March 14, 2012, it was released as a ringtone on Japan's Recochoku ahead of 2PM's compilation album
2PM Best: 2008–2011 in Korea, where it could also be found as a bonus track in Limited Edition B. "Alive" managed to quickly rank in at number one on the daily chart. Following this,
JYP Entertainment stated that the song "shows a deeper look into Jun. K's unique musical world. It has a smooth beat that reveals a new charm to the singer." He also recorded "Love... Goodbye" for the soundtrack of the Korean drama
I Love Lee Tae-ri. It served as the male lead's theme. Jun. K began his acting career in 2013 with the role of D'Artagnan in the musical
The Three Musketeers. Also in 2013, he played the role of Daniel in the musical
Jack the Ripper. In December 2013, he returned to his role of D'Artagnan in the musical
The Three Musketeers performed in Tokyo, Japan.
2014–present: Solo activities In an interview with
The Star in 2014, Jun. K revealed that
Oricon's editor-in-chief had said
Love and Hate was the number one album released in Japan that year and expressed his gratitude: ''"When I heard this I felt even better. I have really worked hard without any rest since December last year. I tried my best to prepare it, but I'm really thankful to everyone who helped me achieve this good result, and everyone who congratulated me."'' Jun. K's Love & Hate concert tour ranked in the top 10 best concerts in Japan by Ranking Box, for having one of the most impressive live concerts of 2014, making him the only K-pop artist on the list. The editor-in-chief stated, ''"The album I personally listened to the most this year is Jun.K's solo album, 'Love & Hate', which was released in May. He's an artist who has an outstanding ability as a singer-songwriter, impressive voice tone, and musical talent. His solo live concert was rich with not only lyrical music but expressiveness as well."'' On June 11, 2014, Jun. K released the Korean version of "No Love". Another song from the Japanese EP, titled "Mr. Doctor", was featured on HOT 97's DJ LEAD's Mix Album twice, in 2014 and 2015. Jun. K's second Japanese album,
Love Letter, was released on November 25, 2015, and quickly reached number one on the Oricon Daily Albums Chart and on Japan's
Billboard charts for top album sales. On December 30, 2015, the Korean version of
Love Letter was released. In July 2016, Jun. K announced the release of his first Korean mini album,
Mr. No♡, digitally on August 9 and physically on August 11. He held a showcase on August 8 before releasing his album and the showcase also aired on Naver's V app. Jun. K's third Japanese album,
No Shadow, was released on December 14, 2016, and reached number one on the Daily Albums Chart and number two on the Oricon Weekly Album Chart and Japan's
Billboard charts for top and hot album sales. Jun. K's second concert tour, Love Letter, and third concert tour, No Shadow, ranked in
Yahoo Japan's 2015 and 2016 "Top 10+1 Best Concerts in Japan" respectively, making him the only K-pop artist on the lists. On November 27, 2017, Jun. K released his second Korean mini-album ''My 20's'' as his final project in Korea before his mandatory military enlistment. The album includes songs Jun. K personally composed and wrote, including the title track "Moving Day". Jun. K's fourth Japanese album,
No Time, was released on April 4, 2018, as the final project in Japan before his army enlistment.
No Time debuted at number three on the Oricon Daily Albums Chart. On December 9, 2020, Jun. K released his third Korean mini album
20 Minutes, with the title track "30 Minutes Might Be Too Long". On March 10, 2021, Jun. K released his fifth Japanese album,
This Is Not a Song. In July 2022, it was announced that Jun. K would hold a fan meeting titled Jun. K (From 2PM) 2022 Fan Meeting "We, Love On, Again" in Japan on September 3. == Personal life ==