The ASEAN Summit in Vientiane, Laos, this week will primarily address international and regional security issues, with leaders expected to confront China and Russia regarding ongoing geopolitical tensions. U.S. Secretary of State Antony Blinken and Japan's Prime Minister Shigeru Ishiba confirmed their attendance, alongside Chinese Premier Li Qiang. President Yoon Suk Yeol of South Korea will participate in key summits, including the South Korea-ASEAN summit and the East Asia Summit, where he is anticipated to express his views on security concerns such as the crises in Myanmar, territorial disputes in the South China Sea, and North Korea's nuclear ambitions. As President Yoon prepares for discussions in Vientiane, he emphasizes the importance of peaceful reunification of the Korean Peninsula for security in the Indo-Pacific region. Recent statements reflect a commitment to uphold international maritime law, particularly following a joint declaration with the Philippines regarding the United Nations Convention on the Law of the Sea. Additionally, Yoon plans to hold talks with Ishiba to enhance bilateral relations, despite historical disputes, while the likelihood of discussing Ishiba's "Asian NATO" proposal appears minimal according to a presidential office official.