S/ Hayashi Yoshimasa, Chief Cabinet Secretary: The violation of Japan's airspace by Chinese military aircraft is not only a serious violation of our country's sovereignty, but also a threat to our security, and we consider it completely unacceptable. The government will continue to watch China's military movements with keen interest and will take all possible measures for vigilant monitoring and airspace violation.

Hayashi also clarified that the Japanese government lodged a strong protest with the Chinese government and that urged it to prevent a recurrence.

The Chief Cabinet Secretary also said that he would refrain from commenting on the intentions or objectives of the Chinese military.