The location is within walking distance of a couple of metro stops, with lots of restaurants around Minato station. Shiba Park and Tokyo Tower are also close by. The road outside can be a little noisy.
The apartment isn’t fancy but is clean and the room has a good heater. Bathroom and kitchen amenities are plentiful.
However, only the door to your room locks. The front door stays unlocked. I was hesitant to leave valuables in my room, though I didn’t have any issues. The neighborhood seems safe.
Tatsunari let me store my bags in my room past check-out time. When you leave you leave the door unlocked with the keys inside.