 For example, in some parts of Japan, tea made from "C. sasanqua" leaves is popular.Tea oil is a sweet seasoning and cooking oil made by pressing the seeds of "C. oleifera", "C. japonica", and to a lesser extent other species such as "C. crapnelliana", "C. reticulata", "C. sasanqua" and "C. sinensis".Relatively little-known outside East Asia, it is the most important cooking oil for hundreds of millions of people, particularly in southern China.