Japan Holiday

We're off to Japan for a holiday in the next coming days.  We're spending time in Tokyo for some tourist attractions and such, then up to the mountains to Sapporo for some snowboarding!

I've asked 2 things of this trip: Disney Land/Sea & a visit to a Sanrio store!  Doesn't seem much, but the little Asian child and Florida Theme Park Girl inside of me is yearning for these!

We've planned to do a bike tour around the city and see some staples like Mt. Fuji and (hopefully) Tokyo Tower.

I was 3-4 years old the last time I lived in Japan, so I really know nothing.  My parents gave some tips, but they haven't been there in over 25 years too.

Have you been to Tokyo or Sapporo?  Any tips or suggestions?