Congress and America's Trickle Down Culture of Fear and Suspicion
You don't experience mass shootings or really much crime of any kind in Japan. Murders, thefts, and other crimes do happen and occasionally someone goes after a group of people with a knife, but an event like Dallas or Orlando or Sandy Hook is improbable in Japan. Part of the reason is that ordinary people can't get weapons like AK-47s or even handguns, although they can own hunting rifles. The result of this is that there is never any reason to fear a mass shooting--or any kind of shooting--in Japan.
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