TOKYO — Prime Minister Shigeru Ishiba of Japan embarked on a visit to Malaysia and Indonesia on Thursday, aiming to fortify defense and economic partnerships with Southeast Asia in light of escalating threats from China in the region.

This trip marks his debut for direct bilateral discussions outside of broader international gatherings, reflecting Japan’s dedication to enhancing its relations with these nations. This initiative comes as concerns grow regarding the potential reduction of U.S. influence in Southeast Asia following the forthcoming inauguration of President-elect Donald Trump.

Both Malaysia and Indonesia, significant maritime nations situated near crucial shipping routes, play an essential role in sustaining Japanese national security and the global economy. They share apprehensions regarding China’s increasing assertiveness, as highlighted by officials.

During his visit, Ishiba is scheduled to meet with Malaysian Prime Minister Anwar Ibrahim on Friday. Discussions are anticipated to strengthen security collaborations and explore strategies to maintain stable supply chains, especially since Malaysia currently holds the chair of the Association of Southeast Asian Nations (ASEAN) this year.

On Saturday, Ishiba and Indonesian President Prabowo Subianto are expected to finalize an agreement pertaining to Japan’s provision of high-speed patrol vessels. The talks between the two leaders, both of whom have served as defense ministers, are likely to delve into military cooperation and the transfer of military equipment.