H.O.T's Jang Woo Hyuk made his solo comeback.

On Jan. 27, an insider within the music industry revealed and confirmed that Jang Woo Hyuk is making a return after a five year hiatus. Jang Woo Hyuk made his solo return on Friday, Jan. 29, with release of the album Back To The Memories. "Back To The Memories" is also the title track of the album.

Jang Woo Hyuk's last solo comeback was in May 2011, with release of album I am The Future. Singles included "Time is [L]over," "I am the Future" and "Minimalism."

Meanwhile, H.O.T members Moon Hee Jun and Kangta (Ahn Chil Hyun) reunited for the first time since 2001 at Moon's solo concert.

Kangta joined Moon Hee Jun onstage at the concerts, held on Jan. 23 through 24, and Jan. 30 and 31 in Seoul.

H.O.T was part of SM Entertainment's first generation male group, which they made their debut in 1996 and disbanded in 2001.