This article explores the question of whether obesity is a crime in Japan. It looks at the background of obesity in Japan, how it is viewed, legal implications, the role of health care system, diet culture and what can be done to help combat this serious issue. It is estimated that over one-third of Japanese adults are overweight or obese due to an aging population, increased sedentary lifestyles due to technology and long working hours, and an increased availability of processed foods high in fat and sugar. There are currently no laws specifically targeting obesity; however existing legislation can be used against individuals whose weight poses a risk public safety or causes disruption on public transport etc. To combat this issue governments should focus on initiatives such as introducing taxes on unhealthy food items; making healthier food options more widely available; increasing physical activity through sports activities; providing better education about nutrition; restricting marketing campaigns for unhealthy food items; creating incentives for companies producing healthier products; encouraging employers to offer healthier work environments etc.