A great place to stay no matter you're a couple or a group of 5-6 people!!! It's really convenient for travelers like us to go from Keiko's place to anywhere in Tokyo. The Hibuya line is 1 min away from the apartment. And you can easily go to Asakusa in 15 min's walk. Her place got everything from washing machine to knifes, plates in the kitchen. You can even make your own meal here.
There is a 24 hour supermarket where you can buy all the things you need for your stay(long term or just a few days). A 24 hour restaurant is right across the road.
Keiko is the best!!! There is earthquake during our stay. We felt the ground was shaking a little bit but everyone around us seemed normal so we just finished our dinner as usual. It was after Keiko texted me that I realized I just went through a earthquake. If you want to put your luggage before your check in or you got late for your flight, she would be happy to help you. If you left something, don't worry. She would text you and even send them to you.