It seems like there are a lot of commenters claiming to be able to do the same thing who didn't read the abstract:
"...various indirect mechanisms possibly mediating this phenomenon were tested: accommodation, brightness, increases in arousal by increased mental effort. None of these behavioral tests could support an indirect strategy as the mode of action"
The effect of the nudge is definitely the main story here, but the redesigned summons form (Figure 1) seems like a pretty good example of the importance of communication design. While there's certainly still room for improvement, the new forms seem much easier to understand.
Anecdotally, this stereotype seems to exist in the United States as well.
When it comes to data, the 2016 National Household Education Survey by the National Center for Education Statistics shows that 51% of parents selected "A desire to provide religious instruction" as an "important" reason for homeschooling their children, and 67% selected "A desire to provide moral instruction" as an "important" reason for homeschooling [0, in bar plot form; 1, original data].
An interesting perspective summarized here [0] is that the bombings were not just unnecessary to end the war and were conducted as a show of force to the Soviets. They were conducted in an attempt to end the war ASAP, before a planned Soviet ground invasion of Japan so that the US wouldn't have to share control over post-war Japan with the Soviets.
"...various indirect mechanisms possibly mediating this phenomenon were tested: accommodation, brightness, increases in arousal by increased mental effort. None of these behavioral tests could support an indirect strategy as the mode of action"