Why does the Japanese have the longest lifespan? Maybe it's their diet?

I think it's their modern medical knowledge and standards.

No, the Americans have the best hospitals. It's their high standard of living and their diet.

yea i guess...
japanese food is light, delicately flavored

Yes, Japanese have a lot of healthy fish in their diet. Beef, however, is becoming more common, therefore shortening life expectancy.

i think it's because if their diet: more fish and tofu.

healthier lifestyle, healthier diet, healthier environment...

the Nordic countries have very high life expectancies as well

Food.

tight name...hidden...sumthin
ahh~~ X.x iunno..
mah bad, i read traditional

Healthy diet, healthy environment, low crime rate ^ - ^

...........its cos they dont wanna die...

advanced health-stuff.
but also natural things, like onsen.

What about their high suicide rate? :p

Healthy country...long life expectancies even when they smoke a whole lot.

hell yea!!><
onsens r tight!
everywun should @ least try it once itz a great experience^^
but wun thing though...dont EVER quickly stand up-right out of an onsen><
heed mah warning