I had a heck of a time trying to find more information about this apartment. Here is what I know, it is roughly 7.5 meters, it is in Japan, yeah that’s it. The center block I think mainly consists of stairway, so you simply climb up the middle and exit there to the perimeter of the apartment. There does seem to be shades for privacy, but the bathroom is still left open.
If anyone know more about this please chime in.