Detailed Explanation:

Shinzo Abe, Japan's longest-serving Prime Minister, was assassinated on July 8, 2022, during an election campaign speech in Nara.

• Key Event: Abe was shot with a homemade firearm by Tetsuya Yamagami while campaigning for upper house elections.
• Significance: The assassination shocked the world given Japan's strict gun control laws and low crime rates.
• Therefore, Japan is the correct answer, making Option 1 correct.