Green tea is a staple in many Asian countries and its health benefits are widely known. Featuring minimal oxidation, green teas are smooth, mild, and often have a slight grassy flavor. Green teas are known for their calming properties and are a good tea for relaxation. They have many antioxidants to promote good health, though green tea must be consumed frequently to fully achieve its benefits. Japan features two distinct varieties of green tea: matcha and sencha. Matcha is unique in that the whole leaf is blended with water and consumed, while sencha has a savory seaweed taste known as umami. On average their caffeine content is half that of a black tea. Those who are sensitive to caffeine generally can drink green tea without any problems.