This AriBnB was great for us.
We booked it only two days before we went to Tokyo, and it wans't a problem at all.
I was suprised by the price. You got a really nice, clean japanese room, near Ikebukuro station (you also can walk from Ikebukuro station, after you missed the last train), for a really, really good price.
The AirBnb was clean, and the Akira was a awesome host. He responded really fast to all our questions and there were no problems for us. We had a great stay at his house. I highly recommend this AirBnB. If i am in Tokyo again, and he has free rooms, i would come again ;)