Hydrogen is the lightest gas on Earth and is made up of two hydrogen (H) atoms, expressed with the molecular formula H2. Hydrogen atoms form bonds with various elements and are found in a variety of chemical compounds, such as water and fossil fuels. This characteristic makes it possible to produce H2 from various resources. For example, hydrogen can be produced by methods such as water electrolysis (H2O) to generate hydrogen (H2) and oxygen (O2) gas.

The use of hydrogen is being promoted both within Japan and overseas as part of efforts towards creating a decarbonized society. There are three compelling reasons for using hydrogen as an energy source.

Leading to Decarbonization

Hydrogen does not emit CO2 when used, making it an environmentally friendly energy source. Additionally, converting unused renewable energies into hydrogen allows for the storage of large amounts of energy over extended periods, thereby enhancing the efficiency of renewable energy utilization. Furthermore, by utilizing hydrogen in sectors* where decarbonization is challenging due to electrification difficulties and other factors, CO2 emissions can be reduced. (*heavy industries, long-distance and large-scale overland transport, shipping, aviation, etc.)

Leading to the Revitalization of Local Industries

Hydrogen can be produced from a variety of locally available resources. The use of local energy sources such as renewable energy and hydrogen in place of imported fossil fuels or electricity produced outside the region can create jobs and revitalize local industries.

Available Even During Emergencies

Hydrogen can be stored and transported. Therefore, it can be used to generate electricity even if the power infrastructure is disrupted due to a natural disaster. Also, since hydrogen is transportable, it serves as a flexible form of energy.