Japanese Prime Minister Sanae Takaichi’s landslide victory has raised concern in China that she may seek to change the country’s pacifist constitution. Beijing would regard any change to the constitution, which renounces the use of force to settle international disputes, as a threat to regional stability and is likely to react strongly to any changes. Takaichi has previously suggested she wanted to change Article 9 of the constitution, imposed after Japan’s defeat in World War II, which...