Who pays for this kind of place? 3M/month rent

I passed by these apartments yesterday and got really curious

https://www.realestate-tokyo.com/rent/B0009177/the-park-residences-at-the-ritz-carlton-tokyo/R0122967/

Right now it seems like there is only one apartment available so a lot of folks are renting them! 20K USD/month is fuck you money even in NYC. Do these people work or is it all generational wealth? Also noticed it asks for a 3 year lease lol i guess that’s normal here