TOKYO, Sept 27 (Reuters) - Japan's restart of more nuclear power plants would help ease Europe's energy supply fears during the winter as more liquefied natural gas (LNG) will become available to the global market, the head of the International Energy Agency (IEA) said on Tuesday.Register now for FREE unlimited access to Reuters.com"I'm delighted to see Japan moving toward restarting nuclear power plants," IEA chief Fatih Birol told the International Energy Symposium in Tokyo.Birol said he met with Kishida on Monday and discussed Japan's initiatives of green transformation, especially use of nuclear power.Last year, Birol highlighted the need for Japan, one of the world's largest importers of LNG, to go back to nuclear sources for the resource-poor country's energy security, climate change measures and competitiveness for the local industry."If Japan restarts (more) nuclear power plants, Japan will import less LNG and more LNG will become available in the market, helping Europe survive for the next few months," he said."