User blog comment:SpookyBoogie27/Light Novel Spoilers/@comment-1359322-20150507234501/@comment-1359322-20150508005453

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Plus there was no death threat directed to Kishimoto, maybe from the Western fans but the Japanese fans didn't. Well you can say that it was partly due to the law protecting them too since there was previously an artist that was given the same threat and couldn't continue drawing due to depression and even fell sick. So any death threat or such is greatly penalized in Japan.