Many guests use cabs from the Haneda International Airport to their hotels, but that will cost you a lot.
The easiest and reasonable way is to use the Monorail from the 3rd floor.
https://www.tokyo-monorail.co.jp/english/haneda-tokyo-access/index.html#terminal
If you have a voucher for Japan Rail Pass, you can exchange it at the 2nd floor (Arrival Lobby) during 6:45am - 6:30pm.
With the JR pass, you can board on Tokyo Monorail, but not Keikyu Railways.
https://www.tokyo-monorail.co.jp/english/haneda-tokyo-access/service.html#travelcenter
If you go to information centers, there are multilingual staff, who are happy to answer your questions.
After the Monorail to Hamamatsucho Station, you're supposed to change to the Loop line of JR (Japan Rail) Yamanote Line, which is shown as Light Green. Please look up and you will see tons of signs leading you there.:-)
Good luck and see you soon!!
