The report looks at how Japan's energy security compares to other advanced nations. They created a way to measure this by considering factors like energy usage, environmental impact, and economics. Japan ranks lower than most countries in energy security, even though it's getting better due to using different energy sources. The study suggests that if Japan increases its use of nuclear power to about 60%, its energy security could improve even more. The next step is to decide which factors to focus on and how to weigh them to better address energy challenges.