How does Japan maintain a low crime rate?

For years, I have wondered how Japan has such a low crime rate. There, you can go to bed at night without locking your doors, children ride the subways at night alone, cars can be left unattended without fear of them being broken into and people can just go to and fro without worrying about anyone bothering them. ... show more For years, I have wondered how Japan has such a low crime rate. There, you can go to bed at night without locking your doors, children ride the subways at night alone, cars can be left unattended without fear of them being broken into and people can just go to and fro without worrying about anyone bothering them. It sure sounds nice. What is Japan's secret to its low crime rate and why can't the US do the same?
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