Tokyo | Rising costs, inflation and lack of policy support threaten billions of dollars of proposed clean hydrogen projects in Australia and globally, industry players have told a conference in Japan.

Japan is shaping up as one of the most important sources of capital for the Albanese government’s ambition for Australia to become a hydrogen superpower. However, a common theme at industry conferences in Tokyo in the past fortnight has been doubt over the viability of the renewable energy push due to macroeconomic pressures.