Australia’s producers of gas and thermal coal are facing growing uncertainty in their biggest market. : Australia’s gas and coal producers are facing greater uncertainty in their top market as Japan drafts new targets to slash demand for the two fossil fuels by 2030. In a draft report released this week, Japan’s government said it expected non-fossil fuel power supply sources to account for roughly 60 per cent of the country’s energy mix within the next nine years, while coal is forecast to fall by 40 per cent and liquefied natural gas (LNG) will nearly halve.