I don't usually give bad reviews because I always try to see the best in everything. But there are just a few things that future guests should definitively know and consider before renting this apartment.
I'll start with the positive things: It's located directly at a train station with a train that goes to Haneda airport. If you have an early flight, it's a good place to crash for a night. Another good thing was that the host was very friendly and quickly answered my messages.
Now the "not-so-good" things. The apartment is located facing a very busy road. All night long there is a lot of loud traffic including trucks, motorbikes, and ambulances.
Another thing that really bothered me was the bed-situation. There are futons and sleeping couches. For the second night, I piled up all futons that I could find and I still felt like sleeping on the floor. The couches are also not comfortable.
There was also rubbish left by the former guests but the host apologized and even gave us a gift.