We stayed at Hotel Mystays Haneda before very-early-flight next day.
This hotel is located at the Keikyu Anamori Inari station, 5 mins to walk.
The entrance is like this :
And this is the room we stayed :
It is very good that you stay with your family and you have to work, the bed hides the light.
Also the chair is nice one, I liked it.
How to connect to Wi-Fi
You can select ‘Mystays_Haneda’ SSID.
Then type the password which is in the room.
Uploading : 16.71Mbps
Downloading : 12.40Mbps
Very good network, I felt no stress.
I booked this hotel via Rocketmiles.
There were a few restaurants and convenience stores, but the room service had a variety of food with cheaper price.
And the shuttle bus service starts from 4.30am so you can get there even on early flight.
Although it might be inconvenient place, I do recommend to stay this hotel, you can consider to stay here.