The Nikkei 225 index held steady at 66,988.82 points, supported by gains in energy and financial shares that countered losses in electronics and pharmaceutical stocks.

Resona Holdings advanced 2.8%, while INPEX Corp rose 3.9%. In contrast, Omron Corp fell 3.1% and Daiichi Sankyo Co Ltd declined 2.2%. The U.S. dollar traded at 159.20 yen, compared to 159.28 yen at 5:00 p.m. Eastern time on Tuesday.

Investors are closely monitoring developments in the Iran conflict and crude oil prices for further market direction.