Пост в Tokyo, Tokyo, Japan

Hello! I'm going to Tokyo in October, my flight arrives at 10:55pm at the Haneda airport and I'm staying at the Shinjuku Washington Hotel. I know that there's a bus that will take me from the airport to the hotel but I'm a little bit concern that this does not function at night, do you have any advice on how I can get to my hotel? Thank you so much! anything will be so much appreciated!