
O: The meaning of Naked is 裸(Hadaka) in japanese right? Are you going to be naked for this song too?
M: There are police officers crawling all over the dome. I will be arrested if I do that.
S: Matsumotoooo, secure him!!!
N: Well if both your arms are held down by the cops, then even if you wanted to cover your front, you cannot cover it! (laughs)
M: Well I am naked, but in spirit.
(source)