Obesity in Japan vs Western countries | Nutritionist Explains | Myprotein
Aug 12, 2026
Why does Japan have such a low obesity rate compared with many Western countries? Despite eating a similar proportion of carbohydrates, average calorie intake in Japan has historically been lower, highlighting why total energy intake matters when discussing obesity and weight gain.
In this YouTube Short, expert nutritionist Dr Richie Kirwan explores Japan as an interesting outlier in the global obesity crisis and explains why carbohydrates alone cannot explain differences in obesity rates between countries.
Key Facts:
Obesity rates vary significantly between countries and populations.
Japan has historically had a much lower obesity rate than many Western nations.
Average calorie intake in Japan has been estimated at around 240 fewer calories per day in the comparison discussed in this video.
This difference exists despite carbohydrate intake being broadly similar in the comparison.
Total calorie intake and energy balance are important factors when understanding long-term weight gain and obesity.
Obesity is complex and is also influenced by factors including food environment, physical activity, lifestyle, genetics, and socioeconomic conditions.
FAQ:
Q: Why is obesity lower in Japan?
A: There isn't one single reason. Lower average calorie intake, portion sizes, dietary patterns, physical activity, and the wider food environment can all contribute.
Q: Do carbohydrates cause obesity?
A: Carbohydrates alone don't determine whether someone develops obesity. Overall energy intake and expenditure over time are key factors in changes in body weight.
Q: Can you eat a high-carb diet and stay lean?
A: Yes. A diet can contain plenty of carbohydrates without producing weight gain if overall calorie intake remains appropriate for your energy needs.
Q: Are calories more important than carbs for weight loss?
A: To lose weight, an overall calorie deficit is required. The amount and type of carbohydrates you eat can affect factors such as hunger, nutrition, and performance, but cutting carbohydrates isn't inherently required for fat loss.
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