The way I see it, people in Japan seem to live the longest / most healthy lifestyles generally speaking.
Correlation not causation but here are some of things I’ve noticed:
1. Eat mostly anything - no restrictions on types of food
2. Active lifestyles - people tend to move more.
3. Stop eating before “oh man I’m full”. It’s basically part of the culture here.
4. Sports - see many adults playing into adulthood
5. Go to doctors often. Any slight issue - people get checked out. Btw I never see media mention this.