I have stayed in Airbnbs all over the world, and this was hands down the worst one, something I didn't expect in Japan.
Let's start with the positives, though. The host communicated well and was responsive, and the location was fantastic in a lovely bustling neighbourhood with great restaurants.
On to the drawbacks:
If you find the smell of raw sewerage enticing, coupled with floors so dirty that they are sticky, then this place is for you. If drawers full of plates and cutlery, freshly eaten from and not even rinsed, in a kitchen with appliances with burned out cords is your idea of a holiday, then look no further. If a toilet on the 3rd floor with the handwash basin on the 1st along with no towels sounds like fun and if steel spring mattresses, covered only with the thinnest of fabrics sounds restful to you, then this is the Airbnb of your dreams.
The host did cancel the booking after our complaint, but we still had to pay more than $800 for the first night.
Don't go here. Don't.