Japanese Prime Minister Fumio Kishida and South Korean President Yoon Suk Yeol visited a memorial for Korean victims of the 1945 atomic bombing in Hiroshima to pray together on the sidelines of the Group of Seven (G-7) summit. The leaders discussed deepening security cooperation, including real-time sharing of data warning of North Korea’s missiles as part of their response to the North’s nuclear and missile threats. Additionally, they discussed cooperation in economic security and engaging with Pacific Island nations, where China is strengthening its influence. Yoon is the first South Korean leader to visit the memorial, underscoring a thaw in relations. Ties between Japan and South Korea have improved significantly since March, when Yoon’s government announced a local fund to compensate some of the former laborers. Tokyo and Seoul, under pressure from Washington, share a sense of urgency to improve ties amid growing security threats in the region.