People have been using eucalyptus essential oil for thousands of years to treat many different conditions, from minor aches and pains to serious diseases like tuberculosis and even cancer.
Japanese people live an average of 84 years, which is much longer than people in other developed countries. This is due to shoku-ku, or nutritional education. Proper food makes the inhabitants of the Land of the Cherry Blossom stay healthy longer. So it is worth to know and benefit from their knowledge.