Japanese Prime Minister Shigeru Ishiba said Thursday that he agreed in phone talks with U.S. President-elect Donald Trump to hold a meeting soon while confirming they will work to elevate the bilateral alliance.

After the Republican was elected U.S. president, Ishiba, who became premier on Oct 1, told reporters at his office, "I got the impression" that Trump is "friendly" and a person who "I can speak honestly with."

Ishiba told reporters he wants to elevate relations with the United States, Japan's longtime security ally, to "new heights" under the next U.S. president.

"I wish to coordinate closely with him to bring the Japan-U.S. alliance and relationship to new heights," Ishiba said.

Ishiba made the remarks days before he is also expected to be reelected as prime minister in Japan's parliament, following a general election in late October.

Trump's return to the White House after his first term between 2017 and 2021 comes as Japan is aiming to boost its defense capabilities and spending to counter security threats from an assertive China as well as nuclear-armed North Korea and Russia.

Japan views a robust U.S. presence in the Indo-Pacific region as essential. However, Trump's protectionist streak, as seen in his preference for higher tariffs and bilateral over multilateral trade arrangements in his first term, rattled Japan and other advocates of free trade.

Earlier Wednesday, Japan's top government spokesman Yoshimasa Hayashi said the bilateral alliance will remain the "linchpin of Japan's foreign and security policies" and serve as the "foundation" of peace and prosperity in the region.

"We will closely communicate with the next U.S. administration to further beef up the alliance's deterrence and response capabilities," Hayashi said.

In recent years, Japan and the United States have been deepening their alliance, extending security partnerships to include like-minded countries such as South Korea and Australia.

Foreign Minister Takeshi Iwaya, who previously served as defense minister, underscored the importance of holding high-level summit talks between Ishiba and the next U.S. president.