I have not been sleeping well – up very early even with black-out blinds – due to the early morning sun (Japan does not implement daylight savings time). It was especially painful the first week we were over, I was up at all hours of the night.
But there are benefits, the Tokyo skyline is spectacular. One particularly beautiful sunrise ..
One very bright moonlit night. It was almost like a 2nd sun lighting the Tokyo Tower (which they light differently on different days).