Seoul, Tokyo Boost LNG, Crude Oil Cooperation Amid Supply Concerns

Lee and Takaichi also reaffirmed closer coordination with the United States on regional security issues.

Japanese Prime Minister Sanae Takaichi (R) shakes hands with South Korean President Lee Jae Myung (L) at the start of their meeting in Nara, western Japan, on Jan. 13, 2026. Issei Kato/AP

Leaders of South Korea and Japan have agreed to deepen cooperation on energy security and regional defense coordination amid the Middle East conflict and pressures on Asia’s import-dependent economies.

South Korean President Lee Jae Myung and Japanese Prime Minister Sanae Takaichi announced the plans on May 19 following talks in Andong, South Korea.