Kana's place is excellent for travel with family.
It is a three storey house in an upmarket and quiet part of Tokyo. It is easy to find and within 7 minutes walk of a train station, which is just one stop away from the main JR Yamanote Train line (which goes everywhere in Tokyo). It is very spacious, easily sleeping three couples + 2 kids.
Kana is easy to communicate with and very quick to respond. But we never had any emergencies or questions as everything was clearly set out, with very thorough instructions provided.
The best aspects of the place was that it was very clean (as all Japanese Airbnb's generally are), and that it had 3 toilets (which many Japanese Airbnb's do not have).
Very happy with the stay, would most definitely stay again.