Released : June 6, 2007 (Japan)
Format : CD
Recorded : 2007
Genre : J-Pop, J-Rock
Length : 4:02
Label : J-One Records
"Yorokobi no Uta" was written and composed by N.B.Comics and zero-rock. Koki Tanaka penned his own rap verses whilst the track was arranged by Gin.K. Though Jin Akanishi starred in the music video for "YOU", this song is the first official single to mark his homecoming after a six-month hiatus which he spent studying English in Los Angeles. The song was also used as the theme song for Tanaka's romantic comedy series, Tokkyu Tanaka 3 Go, which aired on TBS
The song was a part of KAT-TUN's 2007 summer nationwide tour set list and can be found on "Tour 2007 cartoon KAT-TUN II You" DVD which was filmed during their last tour date at the Tokyo Dome. The song was also sung as part of a medley performance on Music Station on December 21, 2007.
In its first week of release, "Yorokobi no Uta" debuted at number 1 with 300,396 copies sold knocking off L'Arc-en-Ciel's "Seventh Heaven" from the top spot. It stayed on the charts for 5 weeks and has reportedly sold over 373,215 copies.
The song was named the sixth best-selling song of 2007 by Oricon and was honored at the 22nd Japan Gold Disc Awards when it placed on the "Best 10 Music Singles (Domestic)" list alongside "Keep the faith".
1. "Yorokobi no Uta (喜びの歌?)"
N.B.Comics (lyrics), JOKER (rap), zero-rock (music), Gin.K (arrangement)
2. "Your Side"
N.B.Comics (lyrics), Shusui, Stefan Engblom, Axel Bellinder (music), FLYING GRIND (arrangement) 3:32
3. "Yorokobi no Uta (喜びの歌?) (Instrumental)"
4. "Your Side (Instrumental)"