This is all you ever wanted for a short term stay in Tokyo. It's literally within 30 secs' walking distance to Minowa Sta., Hibiya Line. (And yes there are elevators.)
You can go for any famous spots in the heart of Tokyo city. The mansion is only 2 stops away from Ueno station (you can totally walk there!) . Yamanote Line takes you to Shinjuku, Shibuya, or Ikebukuro directly in a very short time. And there are easy accessed to Asakusa, Akihabara, Tsukiji, Ginza and Odaiba. You name the destination!
FYI, it took me only 40-ish mins to Yokohama, Kanagawa.
Beside the too-good-to-be-true location, the room itself is perfect too. Furnished with everything of a real "home", the mansion is clean and spaceful. What impressed me most, is the host, Keiko-san, she is the best.
Keiko-san has being really kind and helpful. She responds quickly. She is a great trip advisor. Talking to her always makes me cheerful. Nicest lady. Best host.
I will definitely recommend this place to everyone. I will definitely come again!