In general, I wouldn’t recommend this place. It is lacking some basic amenities like a mirror in a reasonable location, hand towel at the sink, and overall sunlight. Cigarette smoke came into the room from neighbors via the intake fan by the front door. We had two people staying, so the cot was out but that meant the bedroom door couldn’t be closed. Showering was near impossible in the tiny space (another reviewer mentioned it’s the size of an airplane bathroom, which is true) and my girlfriend & I are of average height and weight.
Also, the location in the title is misleading. It’s about a ~7 min walk to Hatagaya station and then another ~10 min train to either Shinjuku or Shibuya. If you want to walk to those places, it will take 20-25 min at least.
This wasn’t the smallest place we stayed in Tokyo; the size was fine. But all of the points above amplified the tight quarters and poor location.