Do the hotel beds seem stiff and hard to anyone else?

I'm mostly catering to business hotels as I had this distinct memory of my first visit to japan where I have this ritual of jumping on my hotel bed belly first during long flights on travel trips.

And as you see where this was going, the bed knocked the wind out of me as I was expecting springs underneath, but what only felt like a futon like mattress that was put on top of a wooden frame.

Maybe I'm just spoiled from American standards of beds? But I thought those japanese beds were rock solid. Don't even know if it used springs.