As others have said: sedentary lives in front of screens, declining nutrition and rising obesity are all culprits. Western media loves to gawk at Japan from a c

As others have said: sedentary lives in front of screens, declining nutrition and rising obesity are all culprits. Western media loves to gawk at Japan from a cultural perspective but I would be careful about drawing social parallels there. It's easy to cherry-pick social trends to confirm bias one way or another. But the physical and material conditions people live in are very tangible and demonstrably unhealthy.