This is one of my best stay I had ever. First of all, Kimie is really friendly and helpful. She replied me as soon as possible everytime I texted her.
About the house, exactly the same as what you see from those pictures. At first it's quite confused from the train station because the station is quite big and I did not know where is the East Exit. But don't worry, try to ask for help. However, if your luggage is not big and heavy, I highly recommend you to go out from exit C-1 ^^ Iidabashi is really near Shinjuku, Shibuya,... Especially for people who use JRPass like my family because they have JR Line and easy to go to other place witg JR Line.
Inside the house is not that big. It's would be great if you go with 4 people. But 5 people is still acceptable. There is everything inside the house. I feel like I stayed as my own house. Highly recommended for people who travel with family.
Thank you Kimie, I hope I have next chance to stay at your place^^