China's foreign ministry says it has summoned the Japanese ambassador over references to Beijing-related issues in statements announced at the Group of Seven summit in the city of Hiroshima.
The ministry says Vice Foreign Minister Sun Weidong lodged "representations" with Japan's ambassador, Tarumi Hideo, on Sunday.
The ministry says Sun told Tarumi that Japan, as the host nation, colluded with other countries in smearing and attacking China and grossly interfering in its internal affairs.
The ministry also quotes Sun as stressing that the move undermines China's sovereignty, security and development interests. It adds that he expressed China's strong dissatisfaction and resolute opposition.
Japan's embassy in Beijing says Tarumi responded that it is natural and will remain so for the G7 to refer to its shared concerns as it has done so far, unless China changes its behavior. It says Tarumi also urged China to take a positive response.