Japanese stocks opened lower on Monday, with the Nikkei Stock Average falling 1.0% to 53,081.07. Kioxia Holdings led the decline, dropping 8.9%, followed by Daikin Industries down 6.9%. The weakness stemmed from investor uncertainty surrounding ongoing peace negotiations to end the war in Iran and concerns about potential energy shortages. The dollar strengthened to 159.66 yen, contrasting with Thursday's close of 159.45 yen, adding pressure on Japanese exporters. Electronics and machinery stocks were particularly hard hit, reflecting broader worries about supply chain disruptions and reduced demand.

The market's focus remains squarely on developments in the Iran conflict and its impact on global energy markets.