Here's the great Japanese Toilet Report.
Yes there are floor pans. I find the crouching uncomfortable and they're hell if you have a knee problem. The flushing isn't always effective and so they can be stinky. And I'm still not sure which way I'm supposed to face.
They also have regular wester style Crappers. This one is my bathroom, notice how everything (shower, tub, basin, toilet) is crammed into a tiny space. I just measured it: 140 x 105 x 195 (high) cm. (55 x 41 x 76 inches).
And of course the legendary "washlet" space-age superloo, with electrically heated seat, built-in bidet, deodorant sprayer, non-contact flushing mechanism and - on some models - a background music player to cover the sounds of splashing.
This is the control arm, the flusher is visible in the picture above, the green glowing light on the wall behind the control arm.
Both the flusher and deodorizer have manual and automatic operation - when the seat detects a big weight reduction (person stands up), it automatically deodorizes. When you move away from the unit, it flushes. It flushed and deodorized after I took these photos even though I hadn't sat on it. Maybe it figured I had taken a leak.