Japan scrambled jets after Russian and Chinese warplanes neared its airspace during a visit by U.S. President Joe Biden on Tuesday, with Tokyo conveying "grave concerns" about what it saw as a provocative move timed to coincide with the Quad summit.
The issues of Taiwan and Russia loomed over the meeting in Tokyo of leaders of the Quad grouping of the United States, Japan, Australia and India, who stressed their determination to ensure a free and open Indo-Pacific region in the face of an increasingly assertive China.
