> Kids in Japan lead carefree "be home by dark" lives up until late middle school and high school, when they start studying 4+hrs/day and sleeping <5hrs/night to prep for standardized tests. I don't think Japan is a horrific dystopia for teens but it's hardly the "let kids be kids" culture that America of yesteryear (apparently) was.

I think that time of Japanese kids' life is actually when they are the most free, they can goof off and do pretty much whatever they want as long inside and outside of school and no one will bother them (parents and teachers likewise), as long as their test scores are OK, that's one of the reasons that 15 is considered the start of the "best years of your life" (seishun).