Christmas plans cluster in the evening. Once the sun sets around 4:30 pm, the choice comes down to how far you walk from the station, whether the room has a bathtub, and whether dinner can happen inside the hotel. A Christmas Eve table has a fixed time, so cut transit for the two hours either side. Check each venue's official notice for light-up dates and hours, which this page does not state.
From Haneda, start with Shinagawa access; from Narita, compare Ueno and Tokyo Station routes. Shinjuku is close to the Roppongi Midtown lights and transit hubs, Ginza and Tokyo Station favour the KITTE Marunouchi illumination and shinkansen, and Tokyo Bay favours Odaiba night views and Disney days.
The illuminated districts of Ginza, Marunouchi, Roppongi and Ebisu are each one or two subway rides apart, so pick one for the evening and leave the others for daytime. From Haneda, Ginza, Tokyo Station and Ebisu are the shortest rides; from Narita, Tokyo Station and Shinjuku need the fewest changes. On Christmas Eve, schedule dinner so you reach the hotel before the last train, or move one reservation into an in-house restaurant.
Check the room type and maximum occupancy, breakfast, accommodation or bathing taxes, free-cancellation deadline and early check-in or late check-out terms in the product details.