なぜ日本の犯罪率は極めて低いのでしょうか?
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Why Japan's Crime Rate Is So Low
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【日本は安全?】Is it true that Japan has less crime? / どんな犯罪が多い?どう防ぐ?
Why Japan's Conviction Rate is 99% (Actually Explained)
日本が安全である8つの理由
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