Thanks - Yes they have announced they are opening in June - this isn't until November so will worry about it closer to the time (and it's FF points so can always cancel or change)Even if you have to do it yourself it was easy There is a Limousine bus service between the 2 airports.
How to Use | Airport Limousine Bus
Airport Limousine Bus is the leading operator of the airport transportation in Tokyo. Smooth Direct Access to and from Central Tokyo and Narita and Haneda Airport. Bus timetables, maps, travelling time and fares information are all listed in this website.www.limousinebus.co.jp
The transfer between Narita and Haneda though is a more modern thing. We were always able to fly BNE-NRT-JFK. Initially straight through but after they moved the JFK service and it then departed prior to the BNE arrival they put people up in one of the hotels. Y pax basic room and nothing more. J pax better room + brekkie and F pax much better room with dinner as well.
Japan is almost certainly going to open to tourists early next month so should be no problems. I would suspect in the first few months JAL and ANA would provide the transfers even if only tickets on the Limousine bus.
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