I loved staying in Kanako's house and I'd happily stay again in the future.
It is spacious, clean, and comfortable, especially compared with other apartments in Tokyo. Great for one or two people.
Her house is located in a quiet area, about a 15 minute walk from Shimokitazawa, one of my favorite parts of Tokyo. I loved living so close because it meant I could spend time digging into Shimokita's awesome bar and music scene well past last train :) It's a 7 minute walk from two major train lines, so you can get to Shinjuku and Shibuya in under 20 minutes.
As listed, the house is traditional Japanese style, with tatami mats, futon, and sliding doors. It gets a lot of light in the mornings, and stays cool in the summer heat with an AC unit.
As someone who works remotely, I also appreciated the well-functioning pocket wifi!
Kanako is a great host, very responsive, and provides an adorable hand-drawn map of the area.