Hmm...i dont think KARA will be perform for 45mins.
I think that the opening show itself will be 45mins, and all the younger performer will perform first (KARA,NYC,Ashida Mana,Suzuki Fuku).
2years ago, they have a special kids stage..and they all perform during the first 45mins.
I might be wrong, but korean media tends to exaggerate their news. I'll wait for futher news from NHK, when they release song list.
Anyway, thanks for the translation. It will be great if we can see KARA to perform on stage together with Mana-chan.