Japan was included in the Seven Countries Study because of its importantly different diet compared to the American and European diets and its low death rate attributed to CHD. Two rural cohorts were enrolled, one of mainly farmers and another one of mainly fishermen having a very high fish consumption. 


The cohorts

The cohort of Tanushimaru was made a “chunk sample” of all men of appropriate age resident in the rural village of Tanushimaru, in the island of Kyushu, Japan, a farming community.

The cohort of Ushibuka was made a “chunk sample” of all of men resident in the fishing village of Ushibuka, in the island of Kyushu, Japan, predominantly fishermen with a high fish intake.

Investigators involved


Go backBack to “Countries”


Read about over fifty years of scientific endeavor.

Read more

Study design

Find out how the research team came to their data.

Read more

Related studies

Browse the other studies that came from the SCS.

Read more


Take a look at the parameters quantified in the SCS.

Read more


Meet the driving forces behind the success of the SCS.

Learn More


Scan the list of benefactors that made the SCS happen.

Learn More