I have an ADR at Teppen Edo for 7:30. There is a balcony in front of the windows of Tokyo dining, and last year, my dbf and I got out of dinner at 8:30, and went and sat down (so we didn't piss off the people inside) and watched Illuminations right there. It was a perfect ending to a perfect dinner and the best park was that there was NO ONE in front of us!