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What are non-patentable inventions in Japan?

Under the Japan Patent Act, the following are not patentable inventions:

  • any invention that is liable to injure public order, morality or public health;
  • laws of nature;
  • scientific discoveries;
  • inventions not using the laws of nature (e.g. economic laws, mathematical methods etc.);
  • inventions contrary to a law of nature;
  • arbitrary arrangements (e.g. rules for playing a game);
  • mental activities;
  • personal skills;
  • mere presentation of information;
  • aesthetic effects (e.g. paintings, carvings);
  • methods for medical treatment of the human body.

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