Opposition parties on Saturday criticized Prime Minister Yoshihide Suga over the results of his meeting with US President Joe Biden, while questioning the reasoning behind the Japanese leader's travel to Washington during the novel coronavirus pandemic.

Yukio Edano, head of the Constitutional Democratic Party of Japan, termed Friday's summit lackluster and said, "I'm not sure why Prime Minister Suga bothered to go (to the United States) in the midst of a coronavirus resurgence."