Sunset comes before 17:00 in late December, so daytime sightseeing runs short and the real itinerary starts after dark. That moves the walk from station to lobby, in-room heating and bathtubs, and a bar or restaurant downstairs to the top of the comparison. Hotels with a public bath or sauna can warm you up after a cold night out, though hours need checking by date. Christmas Eve tables fill quickly, so a hotel with its own dining is a sensible fallback.
Compare the Nankai route from Kansai Airport to Namba with bus or rail options for Umeda. Dotonbori and Kuromon Market are walkable from Namba; Umeda combines winter evening routes with trains toward Kyoto and Kobe.
Nankai trains into Namba keep a last-train time, so a late Christmas arrival favors a hotel tied to the station, while Umeda calls for a separate check of the last airport bus. A USJ day can flow into a late Umeda stroll by changing to JR for Osaka Station. Fix Christmas Eve in one district and keep the ride home to two or three subway stops.
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.