A comical illustration titled "The Last G7" has been spreading online in China, depicting Japan as a dog pouring mysterious green water into a glass from a kettle with a radiation warning symbol.

A Chinese cartoonist produced a mock-up of Leonardo da Vinci's "The Last Supper," with the Communist-led government lambasting Japan's decision to release treated radioactive water into the sea from the crippled Fukushima No. 1 nuclear power plant in two years.

Portraying animals, the picture mocks the Group of Seven countries — Britain, Canada, France, Germany, Italy, Japan and the United States — as well as Australia and India, all of which have been trying to counter China's growing assertiveness.