Two Russian strategic bombers Tu-95 that flew down from the airspace east of the Korean Peninsula joined a pair of Chinese H-6 bombers over the East China Sea for a joint flight down to the Pacific off the southern coast of Japan's Shikoku island.

While diplomatic tensions between the two countries are not new, both have little to gain from the current dispute subsiding.

As China-Japan diplomatic row ripples into entertainment, over 30 Japanese performances have been abruptly cancelled, leaving millions of fans of Japanese culture in China worried about a potential broader cultural ban.

Japan is threatening China militarily which is "completely unacceptable", Chinese Foreign Minister Wang Yi told his German counterpart, after Japan said that Chinese fighter jets had aimed their radar at Japanese military aircraft.

No end in sight to spat between Japan and China over Taiwan, as neither Tokyo nor Beijing shows signs of backing down.

China is turning to a well-used playbook to express its displeasure with Japan over a statement by its prime minister on Taiwan.

Denryu Lin, who runs about 80 vacation rentals in central Osaka, is watching his business evaporate since late November as tensions between Tokyo and Beijing escalate.

This follows joint drills by Chinese and Russian strategic bombers and fighters on Tuesday that prompted Japan and South Korea to scramble planes to monitor them.