I'm not an expert in this, but the historical Okinawa diet doesn't have as much in simple carbohydrates compared to other lifestyles[1]. I think calorie intake

I'm not an expert in this, but the historical Okinawa diet doesn't have as much in simple carbohydrates compared to other lifestyles[1]. I think calorie intake is a notable aspect like you mentioned, but eating foods with a higher satiety strikes me as making a larger impact as well. https://en.wikipedia.org/wiki/Okinawa_diet https://en.wikipedia.org/wiki/Okinawa_diet