Originally Posted by
manfurismojive
We are flying from SFO direct to HND. Unfortunately by the time the equipment change was announced, the rear 2 seaters were already occupied

Do you mean Y T-48 as in booking class Y, 48 hours from departure? Unfortunately our flight is also not even in Y class, we are in L.
I guess our best bet then is probably to just change to the center aisle seats D-E for the best chance of being undisturbed.
Sorry, I meant in economy class, not just booking class Y. If I remember correctly, a few of the pairs at the back are actually blocked and not occupied. ANA typically opens these seats up at check-in (T-24 hours). However, in the (quite likely) case of a full flight, ANA may block online seat reservations by that point and the only way to switch to those seats will be to request it at the airport. As you can imagine, that is a huge risk. I would agree that D-E is the best bet for your needs.