Originally Posted by
Aventine
It's going to be 2 or 3 transfers to get to the Haneda monorail but if you're intent on subwaying it then being on the Ginza line is best. Prince and Andaz check that box. If it's good weather and you're inclined you can walk to Shimbashi from Andaz and make it an even simpler 1 transfer to the Haneda Monorail. I'd go with the hotel most willing to give a late check-out and that satisfies your hardware needs.
Not true. Prince Gallery -> Haneda is only one transfer. Ginza line -> Asakusa line. It's super easy if you don't have crazy amounts of luggage and only takes about 45min. No need to take the monorail.