When you say Haneda International Airport (Haneda Airport or HND) is not only Tokyo’s and Japan’s main domestic airport hub, but a major international airport too. Haneda is located much closer to downtown Tokyo than Narita town.
When you want to go to down town or Tokyo? The trains from Haneda International Airport can monorail from Haneda to Hamamatsucho Station on the Yamanote Line and it take approx. around 20 minutes.
You can grab buses from Haneda International Airport which is limousine buses from Haneda to Tokyo City Air Terminal (TCAT) at Suitengumae Station on the Hanzomon Line, Tokyo Station, Ikebukuro, Shinjuku and other destinations. The limousine bus also take you to the hotel,too. But you have to book same name as limousine bus stop.
you can take a taxis from Haneda International Airport . This is reasonable around 6,000 yen to the main city (Tokyo).