There is "a serious lack of mutual trust in military and defense matters" between Beijing and Tokyo, Chinese Ambassador to Japan Cheng Yonghua said.

In an interview with China Daily, Cheng, a member of the Chinese People's Political Consultative Conference National Committee, mentioned Beijing's concerns over Tokyo's developing security agenda.

Since the summer of 2015, Japan has worked to ease restrictions on its exercising a right of collective self-defense, and it has passed radical new security bills, Cheng said.