This 2011 single showcased KAT-TUN's signature dance-pop sound with a harder edge, marking a consistent output from the group in the early 2010s.
- "Birth" reached number one on the Oricon Weekly Singles chart, selling over 157,000 copies in its first week.
- The single was released on November 30, 2011, by Storm Labels.
- The song features a driving synth line and a powerful vocal performance, characteristic of KAT-TUN's more upbeat tracks.
KAT-TUN is a Japanese boy band formed in 2001, known for their blend of J-pop, rock, and dance music. At the time of "Birth"'s release, they were riding a wave of popularity following their 2010 arena tour and a string of successful singles.
Tracklist
