Min and Haru's place is 100% great. Absolutely as described and I really enjoyed the tatami and futon experience. All the private rooms are spacious and have heating and air conditioning you can flip on as and when needed .
The public areas are super cool with personal touches everywhere left by previous guests, it has character and history to it!
As for location, brilliant. You're never more than 30 min max from anything of relevant interest in Tokyo with a lot of cool flashy stuff a short walk away. Plus there's a bunch of konbini on the same road that open 24hrs.
Min and Haru are brilliant hosts. Funny and friendly and always able to answer any questions you could have. I had a great time hanging out with them including picnics and a BBQ! Plus you can also meet people in the house depending on who is there.
Hands down the best Airbnb experience so far and I'm going to definitely come again. 5 stars everything!!