The Japanese government plans to set a target of using 10 million tons of hydrogen domestically by 2030 and adjustments are currently underway. Japan proposes to achieve net zero emissions of greenhouse gases by 2050, for which the use of hydrogen that does not emit carbon dioxide is indispensable. Japan plans to increase the use of hydrogen as a fuel for power generation and fuel cell vehicles (FCV), boosting its popularity by cutting costs. The "Basic Hydrogen Strategy" summarized by the Japanese government in 2017 set a target of using 300,000 tons of hydrogen by 2030. 300,000 tons of hydrogen is equivalent to about a year's operation of a 1 million kilowatt nuclear power plant. If it is 10 million tons, that would be equivalent to 30 nuclear power units operating for a year, or more than a tenth of Japan's total domestic installed capacity. In order to achieve the de-carbonization of electricity, Japan is pushing for the use of renewable energy such as photovoltaic and wind power, but will still need to retain existing power stations due to weather problems. If hydrogen is used as fuel for power stations, greenhouse gas emissions can be reduced. In addition, surplus electricity generated from renewable energy sources can be used flexibly to produce hydrogen and store it. The current issue is the high cost. One cubic meter (Nm3, the volume of gas in the standard state) of hydrogen is now thought to be around 100 yen. Significantly higher than the equivalent volume of liquefied natural gas (LNG) at around 13 yen. Reducing hydrogen prices to the same level as LNG is said to require an annual supply of 5 million to 10 million tons, a target that the Japanese government has clearly mentioned the time to achieve this goal in 2030 in its revised basic hydrogen strategy for the future.