Fumi's place is just as described and awesome.
The houses is neat, clean and has all you would need to either self cater or just use like a hotel. There were 6 of us and the house is well suited for this many people. We never felt cramped and the fact that there were two toilets was a plus! The upstairs floors are heated which kept us nice and warm and there's also reverse cycle air conditioning upstairs. Downstairs in the main bedroom there is reverse cycle air conditioning and a gas heater near the bathroom which warms the area up quickly.
The house is well positioned for transport and shopping with the supermarket and train station within 5-8 minutes walk.
We went to a couple of local Japanese restaurants in the area which were great and also ordered take away pizza one night from a local Italian restaurant which was excellent. Other nights we ate out wherever we were at the time.
We felt safe the whole time we were in Tokyo.
I wouldn't hesitate in recommending Fumi as host. His communication was excellent and his instructions on getting to his place were perfect. He messaged us to make sure we arrived safely and then reminded us that check out was 11:00am the day before we were due to leave. I'm sure if we had any problems he would have been only too happy for us to contact him.
Overall we had an excellent time in excellent accommodation and I only hope we can come back one day soon.
Thanks Fumi!