The room is good for one person. For two could be too small. Since I was alone, it was ok. It is well organized. There's an air conditioner, a small fridge, a hair dryer in the room. There's also a private bathroom and a shared kitchen right behind the wall (light sleepers might feel inconvenient because of the noise made by other people staying at the place). Shampoo, conditioner, body soap and towels are provided.
I liked the place. Reasonable price and very convenient location: Tawaramachi metro station on the Ginza line is 7 minutes walk from the place. Asakusa metro station (going directly to Haneda airport) - 15 min walk. Very beautiful temple nearby and a shopping street, where I bought souvenirs for my friends. Plenty of restaurants around. Besides, there's a bank at the entrance of Tawaramachi station, where you can exchange currency.
Yoshimoto, the owner, was responding to my emails when I had questions immediately.
Thanks for my good stay, Yoshimoto!