Awesome project.
I consider myself someone with a good sense of direction in big buildings, malls, hospitals, etc., maybe a side effect to playing video games and such, but it's rare for me to get lost in big, complex structures.
But man, Shinjuku humbled me badly. That thing is a Metroidvania level IRL. If you ever go there, please don't buy a ticket with only 5 minutes to get to the right platform. Give yourself at least 15 minutes or more.
It's an awesome place, but even with signs in English, it can be easy to get lost.