Japan is widely regarded as one of the world’s most developed nations. The country’s electronics industry, in particular, is consistently ranked among the global leaders in innovatiion. Industries such as automotive, construction, electronics, metal, and telecommunications, companies have traditionally leaned more heavily on debt financing for both their day-to-day operations and investment endeavors, rather than relying on equity financing. In Japan, debt financing is favored as cost-effective source of capital compared to equity financing. The study selected 257 automotive, construction, electronic, metal, and telecommunications companies between 2000 and 2021. To find the effect of financial leverage on financial performance, the study used the random effect and the GMM to estimate the effect of the firms’ leverage on financial performance. The study found that interest coverage has a positive and statistically significant effect on ROA, ROE, and Tobin’s Q. The study discovered that cash coverage has a positive and statistically significant effect on ROE. The study found that debt service obligations have a negative and statistically significant effect on financial performance.