I had a great stay in this lovely detached house nearby Ueno. The size is perfect for a couple, and if you travel with 1 or 2 kids too.
the living room/kitchen is 1 room but convenient. The fridge is big enough, and there is a real freezer with a ice cube tray, which is convenient during summer.
Having a good brand washing/dryer machine (Hitachi) is great. The mattresses and bedding are really good.
You can walk easily to Nezu station (chiyoda line). It’s also east to go to Ueno Station:l it takes a bit more time but you can walk by Ueno park which is really nice.
The wifi works really well.
I haven’t met Toshiko-san, but he is easy to communicate with!