Mr. Hisao and his wife are great hosts! His wife is incredibly sweet, and she even made sandwiches without meat for me (I'm vegetarian). The location is also great, right near Ueno Park, and you can't beat the price!
The only negative thing I can say is that the room I was in was very dirty. The sheets and desktop were clean, but the bathroom and kitchen were very dirty. There was burnt on food in the pot and grease splatters in the kitchen, and there was so much mold in the bathroom. I was able to clean it all pretty easily, but it was a letdown. The tatami on the couch also had... dust? Mold? Growing on it. I'm pretty sure it was mold, since it smelled almost like pee and it seemed to come back every few days after wiping it down.
Despite all this, if you're willing to do cleaning or just deal with it, I HIGHLY recommend this bnb.