I am sure some people maybe changing their plans. Haneda Airport is south of Tokyo near the City of Yokohama. This is the old airport for Tokyo. The new airport is Narita about 100 miles north. I know there is a shortage of face masks in most of the countries in China and nearby. Some of the Home Depot stores here in California and Texas have sold out of face mask. If you continue with your trip make sure you have a supply of face masks.

I'm not quite sure if you can see mt. Fuji from the observation desk, but it is in deed amazing view.

Can you visit the observation deck while transiting or you need to exit & then go through security again?

Yokohama port to Haneda airport by car is about 30 minutes. since your flight out of Yokohama is 10am, I will advice you to take a cab so you will not be delayed at the airport terminal. Allow yourself another 1 hour just to get through; for if you have bags to checked in , security and immigration are another issue. Please be informed that is you arrive in Yokohama you should have "all" you bags ready instead of picking them out of the cruise port. Meaning as soon as you exit you just have to take the cab to the airport. Next cruise you should schedule your flights after 12noon (post-cruise)

I recommend to go to Taito, Tokyo by mono rail and subway , one day pass. For 7 hours to go sightseeing don't take bus.

There are free bus to airport terminal maybe you can find something what you interested in....

I have seen travelers' comments that the hotel is great for those who have early departures. You could email the hotel directly. We arrived at 10:00 pm and it worked out nicely. We understand taxis don't run after 11:00. Your hotel concierge should be able to tell you the time you should leave the hotel, or airport information. We try to be there 3 hours before flight time. The airport limousine (bus) stops at our hotel so we went directly to the airport for our evening flight. I hope this helps.

If you're planning to go straight to Narita Airport from Haneda Airport, you might want to take the Airport Limousine (bus) just look for their ticketing counter. Same way if you're going for a side trip, i would suggest going to Odaiba or Yokohama. From there you might need to take a train and transfer to another train (Narita Express) to get to Narita. Before even leaving Haneda, be sure to check with the ticketing counter about your transportation options. And don't hesitate to ask any tourist desk or the front desk at any train station, since they are very willing to help tourist go around Japan.