100% renewable targets will require power storage to manage flows on the net
Electrolysers utilise these intermittent power flows to produce H2 gas from water
H2 gas can be stored in large quantities underground and transported via existing gas pipelines
H2 vehicles recharge faster and are more durable than battery powered transport
Growing H2 demand in industrial processes will reduce costs and increase supply

At the H2Expo in Hamburg, responsible director for hydrogen at NEDO and IPHE chairman, Michio Hashimoto, the Japanese National Energy Basic plan 2014 indicates  hydrogen as one of the necessary energy sources for Japan. In response METI adopted a new strategic roadmap for H2 in June 2014, together with an announcement  of prime minister Abe to reduce regulatory barriers. The roadmap includes  3 phases:

1. Expand the FC networks and FCEV: 100 stations by 2015 co financed with 50% by national government

2. Establsih global supply chain of hydrogen

3. Renewable hydrogen to be realized by 2040.