I am flying to Sapporo next week on ANA. Some questions about Haneda.

1. Are monorail and keikyu just as convenient getting to Terminal 1?

2. Hyperdia indicates that I transfer form Oedo to Asakusa and then Asakusa subway becomes Keikyu; is that all on passnet without having to go through turnstiles mid-trip?

3. How far in advance should I plan on getting to Haneda (this will be a Saturday morning)?

4. I saw that normal 22" rollaboards are legal (as long as under 15kg); is there a restriction on liquids for domestic flights? Will they try to get me to check the bags? Can I expect there to be overhead space available?

5. Has anyone had luck paying for upgrade to Super Premium day of flight?

6. Is Suica card accepted by JR Hokkaido or do I just get single tickets from airport to Sapporo Station?

thanks,
Marc