"I congratulate Yoshihide Suga on his election by the Diet as the next Prime Minister of Japan," Pompeo said in the statement on Wednesday.
The US-Japan alliance is the cornerstone of peace, security and prosperity in the Indo-Pacific region and remains central to upholding a rules-based international order, Pompeo said.
"The United States looks forward to working with Prime Minister Suga in promoting the Alliance as a force for transparency, accountability, openness, prosperity, and peace in the Indo-Pacific and around the world," he said.
Pompeo also sent his congratulations to Foreign Minister Toshimitsu Motegi who will continue in office in Suga's new government, the statement said.