U.S. President Donald Trump said Monday that a memorandum to end fighting between the U.S. and Iran has been established [1].

The agreement aims to secure safe navigation in the Strait of Hormuz and progress toward a final resolution regarding Iran's nuclear program [1, 2]. Because Japan relies heavily on the shipping lanes of the Persian Gulf for energy imports, any movement toward stability in the region has significant economic and security implications for Tokyo.

Prime Minister Takaichi welcomed the announcement, describing the development as "a major step toward the resolution of the situation" [1]. Following the announcement, the Japanese government began reviewing potential responses, including the possible dispatch of the Self-Defense Forces to the Strait of Hormuz [1, 2].

However, the Japanese government remains cautious about the timing of any military deployment. A senior official from the Foreign Ministry said that a substantive ceasefire, rather than a provisional agreement, is necessary before sending troops. The official said that such a move would not happen immediately [1].

Reports regarding the stability of this peace process are inconsistent. While the Trump administration signaled a breakthrough on June 15 [1], subsequent reports from BBC Japanese indicated that U.S. Vice President J.D. Vance said on June 28 that an agreement had not yet been reached, though they were very close [3]. Furthermore, the BBC reported that U.S. forces conducted airstrikes in southern Iran on June 25 [3].

These contradictions suggest a volatile diplomatic environment where official declarations of peace may not yet align with military actions on the ground. Japan continues to monitor the situation to determine if the security environment warrants the deployment of its naval assets [1, 2].

“"a major step toward the resolution of the situation"”

The discrepancy between the White House's announcement of a memorandum and subsequent reports of airstrikes and unconfirmed agreements indicates a fragile peace. For Japan, the decision to deploy the Self-Defense Forces depends on whether this memorandum is a genuine ceasefire or a temporary diplomatic gesture, as the risk to personnel remains high if hostilities continue.