I highly recommend Ayaka's place; especially if you need to be close to the Univeristy of Tokyo (it literally is across the street), want to explore Ueno or you are just a lover of sakura blossoms. Also Ayaka is such a lovely person - and a great cook - such excellent breakfast. Indeed she very fairly warns of the stairs and I appreciate that (personally, I have no issue whatsover with some stairs and her appartment is located in small apartment building, so all in all, not troublesome at al). Tokyo in summer is hot - so be aware of the need to turn on the airconditioning. As said, one of my best stays in an Airbnb (and I have done my share ;) Great value!