Japanese equities kicked off Tuesday's trading with modest gains, while market participants kept a close watch on diplomatic signals from US-Iran negotiations.
The Nikkei 225 added 50 points, or 0.07%, to 72,404.37 at the opening bell.
Washington's decision to grant Tehran a two-month reprieve on oil exports through a special license has provided some relief to global energy markets.
Brent crude rose slightly to above $78.
Across the Atlantic, British politics captured attention as Keir Starmer's planned exit cleared the path for Andy Burnham to potentially become the UK's seventh prime minister.