<h1>Japan prime minister and South Korea president hold likely final summit to align on security, trade, investment and AI policy</h1> Japan's outgoing prime minister met with South Korea's president in Busan for a likely final summit to coordinate on security, trade and economic cooperation amid shifts in global trade policy. The leaders discussed sustaining high-level communication after the premier's planned departure, addressing demographic and AI policy challenges, North Korea and supply-chain vulnerabilities, and aligning large industrial investment pledges tied to U.S. tariff concessions. Key legal and policy issues include cross-border investment structures, loan versus upfront-payment disputes with the United States, continuity of bilateral commitments after a leadership change, and regulatory coordination to protect shared economic and security interests.