Japan and China will work towards launching a direct communication line for security from this spring, Japan's defence ministry said on Tuesday in a statement after talks between senior defence officials from both countries.
Japan told China that violations of its airspace by unmanned surveillance balloons were unacceptable, Kyodo news agency reported, citing a Japanese defence ministry source.
Tokyo also urged Beijing to examine the situation and take preventive steps, the report said.
Japan's Defence Ministry said last week it "strongly suspects" Chinese surveillance balloons had entered Japanese territory at least three times since 2019.
Senior officials from the two nations are due to meet on Wednesday for security talks.
(Reporting by Kaori Kaneko; Editing by Andrew Heavens)
