I and my parents stayed in Hiro and Yasuko san's places for 3 nights. We really had a good time. The apartment is not so big but it has everything you need, kitchenwares, oven, microwave and so on.
We definitely will stay here again if our family go to Tokyo next time.
We also took photos with Hiro and Yasuko san. They served us tea and snacks on their beautiful roof top garden.