From the medical examination held on 1988, an interested fact was observed that the cardiovascular disease related examination results of the Ulleung-Gun inhabitants were more marked than those of other areas. An intended search for hypertension with related tests was executed from September $3^{th}$, 1989 to September $7^{th}$, 1989 on 344 Ulleung-Gun inhabitant and the results were as follows. 1) Among the 344 subjects, males were 94 and female, 250. The reason of showing lower number of males than the number of females was due to the fishing work season of showing lower medical examination period was overlapped. 2) 58% of the subjects are the age of over 50 years old. 3) The suspected cases were 68 among 344, and the suspected rate was 19.7%. 4) Abnormality rates of related tests were as follows : suspected ECG 10.1%, hypertension 9.0%. high triglyceride value 5.8%, and high total cholesterol value 4.6%. 5) Table 5 shows that the higher of ages, the higher of ages, the higher of the suspected rates of all 4 related and results. especially the abnormality of hypertension and EOG was marked. 6) Table 6 shows that the incidence of hypertension was higher from the subjects having family history than those who had no family history, from those taking foods salty than those taking foods unsalty, from those taking diet of meat than those taking vegetable diets. 22 cases among 31 had abnormal ECG results and/or high triglyceride values. But there were 5 subjects who had no hypertension related factor.