Ah, Japanese toilets. I lived in Japan twice for a total of about 1 1/2 years, in 1988 and 1990-91. Older public buildings still have the squat toilets, but anything reasonably new has gone “western-style” (yo-shiki). I used to keep track of Mr. Donut, KFC and Makudo (McDs), which not only had the western toilets but kept them quite spotless.
Older Japanese thought western-style disgusting because your body actually came in contact with something. And doctors insisted that the position used was healther because it involved less straining - of course, they weren’t thinking of the knees and quadriceps of people unused to it!
And there’s another danger, mainly for men. Depending on your angle, if you take a leak after finishing other business you can end up hitting your shoes. Not fun.
One thing you see all the time is people squatting in the same way as they’re waiting for the bus, if there’s no bench available. I got rather used to doing that myself - never had trouble with cramping. And yes, you can definitely read a newspaper once you get used the position.
Now, many japanese homes have what I call the wash-dry-and-fold toilet seats, with all sorts of mechanical contraptions attached that are quite intimidating. For a QuickTime demo of what I mean, click on the “Chloe Washlet” here.