South Korean President Yoon Suk Yeol. (Photo: VNA)

The visit comes as the Biden administration intensifies efforts to promote relations with South Korea and Japan, two important security allies in Asia.

A joint statement on measures to enhance extended deterrence and the US commitment to mobilize the full range of its military capabilities, including nuclear, to defend its ally is expected to be a highlight of Yoon's summit with Biden at the White House on Wednesday.