The apartment itself is fine. It's very small but that's normal for Shibuya.
I gave this apartment a 1 star review because it has a serious safety issue, big enough that I don't think anyone should be living or staying in this apartment until it is properly addressed. Gas to the stove is fed via a plastic pipe that is extremely close to one of the burners. When a member of my group heated up water in the morning, the pipe started to burn/melt. If she wasn't aware enough to immediately turn it off, I believe the following could have happened:
1. Pipe melts through, causing the flames to reach the gas in an open gas line. Due to the lack of oxygen in the pipe I don't think this would cause anything other than a brief flame.
2. The burner shuts off but gas flows freely into the apartment, filling it.
3. Any subsequent spark then causes a huge and potentially deadly explosion.
This is one of the stupidest and most reckless things I've ever seen, and it needs to be addressed ASAP before anyone gets hurt.