Green with Milk and Sugar: When Japan Filled America's Tea Cups - Paperbackby Robert Hellyer (Author) Today, Americans are some of the world's biggest consumers of black teas; in Japan, green tea, especially sencha, is preferred. These national partialities, Robert Hellyer reveals, are deeply entwined. Tracing the transpacific tea trade from the eighteenth century onward, Green with Milk and Sugar shows how interconnections between Japan and the United States have influenced the daily habits of people in both countries.