US envoy, after Seoul visit, reassures Japan of alliance U.S. Deputy Secretary of State Stephen Biegun, left, and Japan's Foreign Minister Toshimitsu Motegi greet each other prior to their bilateral meeting in Tokyo Friday, July 10, 2020. (Behrouz Mehri/Pool Photo via AP)
U.S. Deputy Secretary of State Stephen Biegun, left, the top U.S. official on North Korea, and Japan's Defense Minister Taro Kono, wearing face masks, greet each other prior to a bilateral meeting in Tokyo Friday, July 10, 2020. (Behrouz Mehri/Pool Photo via AP)
U.S. Deputy Secretary of State Stephen Biegun, left, the top U.S. official on North Korea, and Japan's Defense Minister Taro Kono, wearing face masks, arrive for a bilateral meeting in Tokyo Friday, July 10, 2020. (Behrouz Mehri/Pool Photo via AP)
Japan's Defense Minister Taro Kono, wearing a face mask to to help curb the spread of the new coronavirus, waits for U.S. Deputy Secretary of State Stephen Biegun, the top U.S. official on North Korea, to arrive for a bilateral meeting in Tokyo Friday, July 10, 2020. (Behrouz Mehri/Pool Photo via AP)
U.S. Deputy Secretary of State Stephen Biegun, left, and Japan's Defense Minister Taro Kono pose for a photo session prior to their bilateral meeting in Tokyo Friday, July 10, 2020. (Behrouz Mehri/Pool Photo via AP)
U.S. Deputy Secretary of State Stephen Biegun, left, and Japan's Foreign Minister Toshimitsu Motegi arrive to attend their bilateral meeting in Tokyo Friday, July 10, 2020. (Behrouz Mehri/Pool Photo via AP)
U.S. Deputy Secretary of State Stephen Biegun, left, and Japan's Foreign Minister Toshimitsu Motegi attend their bilateral meeting in Tokyo Friday, July 10, 2020. (Behrouz Mehri/Pool Photo via AP)
U.S. Deputy Secretary of State Stephen Biegun, left, the top U.S. official on North Korea, speaks as Japan's Defense Minister Taro Kono, right, listens during a bilateral meeting in Tokyo Friday, July 10, 2020. (Behrouz Mehri/Pool Photo via AP)
U.S. Deputy Secretary of State Stephen Biegun, left, and Japan's Foreign Minister Toshimitsu Motegi greet each other prior to their bilateral meeting in Tokyo Friday, July 10, 2020. (Behrouz Mehri/Pool Photo via AP)