KAT-TUN's 2006 single "Real Face" marked their highly anticipated major debut, setting a precedent for debut single sales in Japan.
- "Real Face" sold over 750,000 copies in its first week, becoming the best-selling debut single in Japan at the time.
- The song was used as the theme music for the drama "GAG Japanese" starring KAT-TUN member Koki Tanaka.
- The single debuted at number one on the Oricon weekly charts and remained there for two weeks.
KAT-TUN is a Japanese boy band formed in 2001, known for their blend of pop and rock music and their energetic performances. In 2006, they were at the height of their early popularity, releasing multiple hit singles and albums.
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