This a wonderful place to stay for visiting Tokyo, it was in a quiet residental area and it was great mixing with everyday life. Only a couple of stops away from Shinjuku, but also an easy walk. We did it numerous times in winter. The Maranouchi line gets you everywhere.
The apartment itself is perfectly contained, spotless, and all the amenities a family needs, it looked like it had been recently renovated.
Yumi and her nephew Kazu were very responsive to any messages,
Once again thank you for the wonderful experience in Tokyo!