This is a good place to stay: even though it's located in a busy area, it's on a tiny street, and the rooms are very quiet. I slept very well in here. The bed is FANTASTIC. Because I came to Japan on a business trip, the day I arrived to this hostel I had just checked out from a 5 stars hotel that my client paid for me. In terms of the mattress, I couldn't feel the difference.
The bathroom is small but very modern and clean; the window is big and the room I stayed in had lots of natural light. Everything was comfortable. The staff was very competent and ready to help at all times.
I would come back without hesitation.