U.S. President Donald Trump hosted Japanese Prime Minister Sanae Takaichi and pressed her to expand Japan's security role in the Strait of Hormuz, and while Takaichi declined to commit direct military involvement, she left open limited non-combat support, The Asahi Shimbun reported on March 20. The two sides also announced tens of billions of dollars in Japanese investment in U.S. liquefied natural gas and nuclear energy infrastructure, alongside expanded cooperation on critical minerals and supply chains.

The summit is Takaichi's first in Washington since her confirmation as prime minister in February, marking an opportunity to define defense priorities, manage trade tensions and expand cooperation in energy and critical minerals. The escalation of the Iran conflict and resulting disruptions to energy flows have elevated the urgency of strengthening the bilateral relationship.