Sato is a great host! She provides detailed instructions and picture maps on how to get to the apartment. She also responds promptly to our questions, almost too fast considering she said that she got a full time job! She actually managed a few other listing around Tokyo and we can tell how experienced she is in being a host.
Now about the apartment the we stayed for 5 days, it is already stocked up with enough necessities like dishes and bathroom stuff - just buy food and drink and you're all set! The place is very roomy for us five adults. The place is clean and well-maintained. It is also very close to convenience stores and restaurants. There is also a washer/drier in case you have limited stock of clothes. The only thing is that there is a fire station behind the apartment that can be pretty loud at night - I suggest bringing some ear plugs if you're a light sleeper.
Overall we are very happy with the service and will definitely use one of her places again for our next trip in Tokyo!