Key points from article :
In Japan, retiring and not keeping your mind and body busy is seen as being bad for your health since it disconnects your soul from your ikigai (a reason for being).
Finding your ikigai is felt to be crucial to longevity and a life full of meaning.
Japanese keep doing what they love, what they are good at, and what the world needs even after they have left the office.
The idea is to keep mind and body active in order to fill yourself with purpose and ikigai on a daily basis.
This is one of the key reasons why Japan have the longest life expectancy in the world.