Writing in the Communist Party newspaper China Daily, Mr Jin called on China to invoke the “security exception” rule under the World Trade Organisation to punish Japan, rejecting arguments that a trade war between the two Pacific giants would be mutually destructive.
Separately, the Hong Kong Economic Journal reported that China is drawing up plans to cut off Japan’s supplies of rare earth metals needed for hi-tech industry.
The warnings came as anti-Japanese protests spread to 85 cities across China, forcing Japanese companies to shutter factories and suspend operations.
Fitch Ratings threatened to downgrade a clutch of Japanese exporters if the clash drags on. It warned that Nissan is heavily at risk with 26pc of its global car sales in China, followed by Honda with 20pc. Sharp and Panasonic both have major exposure. Japan’s exports to China were $74bn in the first half of this year. Bilateral trade reached $345bn last year.