Yoko's house played a big part in the success in our stay in Tokyo. The place is conveniently located less than 10min walk from train station direct to Shinkuju/Takadanobaba with plenty of connections to the main Tokyo's attractions. House is bigger than Japanese standard, super well equipped and decorated. Yoko and Yazu are extremely friendly hosts who are making sure everything is OK and very reactive. They gave us plenty of nice advice.
The area is full of small shops and supermarkets, open 24h a day so we were never short of bare necessities.
Since we are frequently travelling to Tokyo, I think we finally found a nice play to stay... Highly recommended.