Might be the wrong forum, and if so, I apologise. Have been noodling over the time signature for Utada Hikaru's 'Passion' for a while now. Figure it must be a 4/16 or 16/16 - something rather odd. Maybe it was just composed long-hand in 4/4, but that's why I'm asking if anyone happens to know!

Also got to pondering the key siganture on this one - another part out of the ordinary. Everything about this track is 'slightly off' from the norm, which is probably why I like it!

The piano sheet music I was able to find on-line shows it in 4/4 in E Major, but from listening to the demonstration that went along with it (from another site), I'm not entirely convinced that's correct...

I appreciate the help, and sorry again if this is the wrong forum!

I'm convinced it's 4/4. I transcribed it for the violin, and it turned out correct.
Just clap along to the song xD