My family loved staying at Kana’s house. It is modern, stylish and in the best area. Quiet but close to the action in Koenji.
It was also very clean with all the amenities you need.
My only comment is that there is no separation of sleeping and living areas, so when someone gets up in the morning, it can be noisy for those still trying to sleep. That said, we all went to bed at the same time and got up at the same time (roughly) - so not a major problem for us.
This is only a minor negative out weighed by a whole lot of positives. We would definitely stay here again.