If you're visiting Ginza, the Kabuki-za, or Tsukiji fish market (it's literally across the street) then the location is ideal. The room is clean, bright, and has all the amenities for a short stay--microwave, fridge, hot plate, and even a washing machine (which came in handy!).
It's true the room is small, but I am 6'6" (198cm) and the only difficulty I had was I needed to duck in the very clean and shiny shower. The owner is also very helpful. I left an article of clothing behind and she shipped it to me (within Japan) right away. I would definitely stay here again.