There have been several mag/news articles - that seemed thoroughly respectable - saying that the original author was a victim of widespread inaccuracies in the actual death records of all the bluezones, along with widespread fraud in old-age and retirement payments. Okinawa was especially corrupt in this area.

Haven’t the “Blue Zones” been thoroughly debunked? They were found to be due to a combination of fraud and unreported deaths, for the most part.