Japanese equities advanced at Monday's opening as US and Iranian forces held back from further counterstrikes, calming market fears over potential energy supply disruptions.
The Nikkei 225 rose 553.8 points or 0.9% to open at 65,164.98.
Washington paused its campaign without explanation, while Tehran also halted retaliation amid talks with Oman over Strait of Hormuz shipping, according to various media reports.
Meanwhile, investors will monitor new tariff announcements, the U.S. Federal Reserve's upcoming meeting, and major tech earnings due later this week.