When I saw the pictures of this house, I thought there were two normal beds in the house, because the host uploaded the two pictures of bed with different bed sheets which makes people to think that there are two seperate normal beds. But there was only one normal bed and one folding bed which you can't sleep on it unless you want to get the serious back problem. If I knew there was only one normal bed, I wouldn't pick out this place for stay.
Also, the house was so cold at night even though I turned on the air conditioner and set the temperature up to 30C with full power. We had to wear heavy duck-down padding in the house at night and wear thick cardigan and outfit when sleeping not to be too cold. I went to Tokyo more than 20 times before and this place was the coldest house I ever stayed in Winter season.
Also, I had a problem with water heater on my last day and had to wait for long time to fix the problem. Host's friend came over and fix the problem who was very nice and polite and I really thank him for helping us to solve this matter. Because when I asked the host for help, he couldn't come over to solve this problem because he was living in China, not in town.
Other than those matters, house was pretty clean and close from the subway station as explained.