Japan's government has recently revised its plans to increase the use of hydrogen as a fuel source in its efforts to reduce carbon emissions. The revised plan sets an ambitious target to boost the annual supply of hydrogen by six times the current level, reaching 12 million tons by 2040. To support this goal, the government has committed 15 trillion yen ($107 billion) in funding from both private and public sources over the next 15 years to develop hydrogen-related supply chains. Japan's decarbonization strategy revolves around the utilization of clean coal, hydrogen, and nuclear energy as a transitional phase towards renewable energy sources. However, concerns over energy security have been heightened by Russia's conflict with Ukraine, complicating Japan's efforts. Nonetheless, other advanced Western nations are advocating for the accelerated adoption of renewable energy technologies like solar, wind, and geothermal power.   Currently, Japan primarily relies on h...