Chocolate is a confectionery containing cocoa (cocoa mass, cocoa butter, cocoa powder), sugar, and other additives (like milk, which is added to milk chocolate).
Directive 2000/36/EC of the European Parliament and of the Council of 23rd June defines chocolate as ...
From China, kombucha made its way to Japan (between 250 and 538).
A Korean doctor who reached Japan is believed to have cured the digestive problems of the emperor at the time with tea fermented with a special mushroom.