A lot of people may wonder what is the best way to get to the city in Tokyo from the Haneda Airport. The train or bus is definitely one option but if you carry a lot of luggage with you, you may want to consider taking a Taxi from or to the airport to/from your hotel in the city. The good news is that you may take a fixed-rate fare taxi if you are staying in a certain ward in Tokyo.
There are some areas that you can not use a fixed-rate fare taxi but if you are staying in one of the major wards in Tokyo, the chances are high that you can take a fixed-rate cab. The fixed-rate fare is mostly less than 10,000 yen so if you are traveling with a few others, it is definitely worth it. Here are some of the taxi companies that offer a fixed-rate fare taxi so please check it out!
Keikyu Taxi: https://www.keikyu-taxi.com/service/57/
Tokyo Hire Tax: http://www.taxi-tokyo.or.jp/teigaku/