We had a wonderful time staying at the appartment. The appartment was very clean, the kitchen was well equipped and the toilet and bathroom were also very clean. Yoshi's wife was very helpful. One night we had a power outage on the heater in the bathroom (it was January and cold), we went over to Yoshi's appartment across the hall to ask for assistance. Yoshi's wife immediately came over to our apartment and fixed it. Afterwards everything was working fine again.
Also, the location of this appartment was good. The metro station can be reached in less than 5 minutes and the train station in 10 minutes. Also there are some good of restaurants and convenience stores near the appartment. We would definitely rent this place again if we re-visit Tokyo.