More than two years after the Fukushima disaster began, 300 tonnes of highly radioactive water has poured into the sea from one of 1060 giant tanks storing the deadly liquid.

"The Australian-fuelled Fukushima catastrophe continues with TEPCO operators calling for international assistance to cope with the most recent leak, which they describe as a ‘serious incident'," said Australian Greens Senator Scott Ludlam.

"Cesium 137, Strontium 90 and other radioactive poison is spewing into the Pacific Ocean every day.

A dairy farmer from a village abandoned because of the Fukushima nuclear disaster joined Greens spokesperson on nuclear policy Senator Scott Ludlam to speak out on the consequences of the nuclear industry - at a press conference in Canberra.

Japan has closed down the Tomari nuclear plant in Hokkaido, the final reactor to close in response to the ongoing crisis at the Fukushima Daiichi nuclear complex.

"The people of Japan have stopped believing the lies told to them for decades about nuclear power being clean, cheap and safe," said Senator Scott Ludlam, Australian Greens spokesperson on nuclear policy.