[afo3]

Hokkaido seems like it is a major problem for this study: it ranks low on stroke mortality and high on ramen consumption and is well known as a land that loves ramen and other rich foods. Perhaps they eat more seafood and that somehow offsets the risk or have some other advantage but it is interesting the authors don’t even mention it given how glaring it is the largest prefecture and one of the easiest to spot on the map for a foreigner.