“This action has raised regional tensions and increased the risk of accidents and miscalculation. We are closely consulting with our allies on this matter here in Japan and in Korea which I will soon visit, later this week,” he said.
China has accused the US and Japan- which both have ADIZs - of double standards, saying the real provocateur is Tokyo.
“This is a hugely consequential relationship that is going to affect the course of the 21st century,” Biden said after being welcomed by his counterpart Li Yuanchao.
Their ties will become the “central, sort of, organising principle in international relations for a long time”, the US Vice President said.
“Like all complex relationships, it calls for sustained, high-level engagement,” Biden said, adding he believed President Xi was committed “to managing our differences candidly and constructively.”
China announced a new Air Defence Identification Zone (ADIZ) last month, and said aircraft flying through the zone must follow its rules, including filing flight plans.