The A$500 million ($355 million) pilot project in Victoria state is one of several Japan is betting on in a push by Prime Minister Shinzo Abe to put hydrogen into vehicles, homes and power stations, with the Tokyo Olympics as a showcase in 2020.

KHI said on Friday it would build a liquefaction facility, storage and a loading terminal by June 2020, with operations to run from 2020 to 2021.

"The hydrogen economy is already materialising in Japan, and it is wonderful to now be breaking ground here in Australia," Kawasaki board chairman Shigeru Murayama said in a statement.

The demonstration project, backed by the Japanese and Australian governments and the state of Victoria, will produce hydrogen from brown coal from Australia's largest coal mine, Loy Yang, owned by AGL Energy.

The process involves coal reacting with oxygen under high pressure at high temperatures to form syngas, a mixture of mostly carbon monoxide and hydrogen. The carbon monoxide is then converted to carbon dioxide with steam, and the hydrogen is separated out.

The hydrogen gas will then be sent by trailer to be liquefied at the plant that KHI is building and shipped in a specialised ship to Japan.

The project has sparked protests from the local community, which is opposed to the coal industry in the Latrobe Valley and concerned about the impact of shipping on wetlands at the Port of Hastings.

"Kawasaki's brown coal project is yet another clean coal pipe-dream, a false-promise to the Latrobe Valley community and an expensive distraction in a time when we need urgent action on climate change," Friends of the Earth coal spokesperson Kate Wattchow said in a statement.

Australia has embarked on its own push to build a hydrogen export industry to supply what has been estimated as a $7 billion market in China, Japan, South Korea and Singapore by 2030.

(Reporting by Sonali Paul; editing by Richard Pullin)