Why aren’t there any obese people in Japan? 🇯🇵

The food seems to have a lot of seed oils, carbs and sugars. 
But walking through the city i don’t see ANY fat people… HOW? https://image.nostr.build/4c75c50a8c9506717bfe1119366d342bf40c192b4a4aa341b26a928af114f6b9.jpg