Japan’s Prime Minister Sanae Takaichi and her government have become the focus of a coordinated, long-term online smear campaign orchestrated by thousands of social media accounts, according to new research. A study by Tokyo-based Japan Nexus Intelligence, which analyses digital public discourse, found that some 3,000 accounts had been actively posting malicious content about Takaichi since late January. The activity surged roughly a week before campaigning for the House of Representatives...