"With a connecting flight the next morning, we booked a one-night stay at Hotel Villa Fontaine Haneda. The hotel is connected directly to Terminal 3 of Haneda airport, via a short walk across the indoor bridge, down the hallway of shops & eateries in Haneda Garden. It can't get more convenient than this!
All the staff we interacted with were professional and ready to assist where they can. My only gripe: Hotel Villa Fontaine Haneda is amongst a growing list of hotels that has a policy of not making reservations for guests. That said, the staff I interacted with attempted to help without breaking policy via helping to call to confirm availability without making the reservation itself.
Given the proximity of the hotel to Haneda Garden, there's an abundance of eateries available to guests. Being jet-lagged and having a mid morning flight the next day, the main places to grab breakfast was the breakfast buffet in the restaurant (which opens 24 hours) and one other Japanese restaurant (which opens at 7 am) in the neighboring eateries building. For convenience and given we woke up a little earlier, we opted to go to the hotel's breakfast buffet. It was not bad, though also not the most memorable.
Overall, Hotel Villa Fontaine fulfilled our needs for the connecting flight and we would stay here again should a similar situation arise in the future!"