[2][3] The song would eventually sell over a million copies by the end of 2006 and was named Japan's best-selling single of the year.

"Real Face #1" was used as the theme song to band member Junnosuke Taguchi's drama two-part television movie, Happy!, aired by TBS on April 7, 2006, and December 26, 2006, respectively.

[5] KAT-TUN performed the song on television for the first time on Music Station on March 10, 2006, and sang on variety show Utawara two days later where they were already regular guests with Jun Matsumoto of Arashi.

The group also collaborated with the song's lyricist, Shikao Suga, for a one-off live performance on Hey!

On Shounen Club Premium in March 2011, KAT-TUN member Kamenashi performed a rock version of Real Face with Suga.

Real Face was reported in 2010 by the Oricon's magazine, OriStar, for having sold over 1,046,125 copies and was later certified Million by RIAJ denoting over 1,000,000 shipments.