Annes Hostel Yokozuna in the Ryogoku area of Tokyo which is also known as Sumo Town. Whilst I stayed there the Grand Tournament was on and I saw Sumo wrestlers wandering the street as well as fighting in the arena at the event.
The hostel is very near to great subway and JR station to get you around Tokyo. Also there are alot of 7 eleven, Lawson and Family Mart type shops around to get snacks and meals. The restaurants in the area are varied and fairly priced.
Inside the hostel is spotless and has two great common rooms which, along with the staff, could not be faulted. The beds in dorm room were pretty much double bed size and comfortable. Definitely one of the best hostels I have stayed in.
I highly recommend staying in the area and in particular at Annes Hostel