it's not NEW

Utawara SP was aired 2 days ago and KAT-TUN was there. i downloaded the whole thing but can't seem to find the 'new' song that they performed. i thought i was just too sleepy to find it but then i realized that the one i've already seen was the one that people are referring to as KAT-TUN's new song. i re-watch it and this time, i caught the title as mentioned by the girl host. ehhh?! it's not a new song! it's not even KAT-TUN's song! it's a JE song but definitely not theirs and most definitely not new. it's one of the old songs of either Genji or Shounentai or Genji Shouentai. ok, i'm not sure who sung it but i'm 100% sure that Kamen Butoukai 仮面舞踏会 is a daisenpai song. KAT-TUN sung this one during the 2006 Johnny's Countdown. or was that 2005? anyhow, it's definitely not theirs. whew! and i was like, they've got another new song without Jin in it?! but correct me if mistaken, ok? i'm not gonna hate you. maybe i'm just too sleepy to realize that IT's indeed a NEW song and IT's KAT-TUN's.