U.S. Senior Official for North Korea Jung Pak told reporters Washington supports any diplomacy with Kim's government, which has not responded to repeated U.S. offers to engage in talks without preconditions since President Joe Biden took office in 2021. "They've shut their borders since January 2020 and we support... any diplomacy there," Pak said in a briefing at the State Department. "Any kind of diplomacy that DPRK does, that's not Russia, is a positive thing," she said in a reference to Pyongyang's growing cooperation with Moscow that has alarmed Washington. Another U.S. official has said Washington wanted Japan to ensure it had "smoothed over" a possible meeting between Kim and Kishida with South Korea. The U.S. has worked to develop three-way coordination of policy on North Korea and other security issues between itself, Japan and South Korea. Pak said she could not say whether North Korea's willingness to speak to Japan could be linked to Seoul's recent move to establish diplomatic ties with the North's longtime ally Cuba, but added: "I think Pyongyang has always been interested in driving a wedge in our relationships or in the relationships between Japan and other countries and Korea and other countries."