We stayed in Tokyo for 2 weeks and enjoyed the convenience of this lovely home. It is located 5 mins walk from Koenji Station, right by convenience stores and supermarkets, making it super convenient. Very close to Shinjuku and good for those with a JR Pass.
The apartment itself is cosy, as all rooms are in Tokyo. The room would be tight for 3 people though. Good for 2: one in the loft and one on the sofa bed. Lovely amenities with washing machine and a small stove. The luggage scale was also largely appreciated. Just note there is no microwave.
We communicated with Tomomasa's assistant and were blown away by their hospitality. They gave plenty of helpful advice during our stay, including local food, and events in Tokyo we would have missed otherwise. I hope to visit their home again on my next visit to Tokyo!