Japanese stocks opened flat on Tuesday after the U.S. military conducted strikes in southern Iran amid negotiations on a potential deal to end the three-month-old war.
The Nikkei 225 gained marginally by 89.1 points to open at 65,247.24.
This followed reports of U.S. military action in southern Iran targeting missile sites and boats laying mines, which occurred while diplomatic efforts continued over a possible U.S. deal to end the three-month conflict.
According to Reuters, the strikes were described by the U.S. military as defensive, with Central Command stating they were intended to safeguard troops from Iranian threats.
The resurgence of hostilities in the Persian Gulf underscores the instability of the current U.S.-Iran truce, especially as hopes had been growing for an extended pause in fighting and the restoration of navigation through the Strait of Hormuz.