ah, sorry I didn't get to catch to credits, nor have I seen enough Japanese films to recognise the actors :/. I am lead to believe that films on aeroplanes are fairly new, but not sure about this film (so it is likely to have released during this year or late last year).
And reptilesandsamurai, thanks for searching!
but unfortunately it isn't that film, although I will watch it!! Hehe, it looks good. I can only blame myself for watching so little of it
I think the band were also slightly lighter themed, possibly indie-ish or pop...