The Japanese people have the longest lifespan due to a combination of factors, including their healthy diet rich in seafood and fermented foods, active lifestyle with regular physical activity, universal healthcare coverage emphasizing preventive care, low levels of stress and strong community values, genes associated with longevity, clean environment, good work-life balance, access to quality education and traditional medicine, emphasis on hygiene, and low rates of smoking. These factors promote an overall sense of well-being and reduce the risk of chronic diseases that can shorten lifespan.