Ryokucha or green tea is Japanese tea. Japanese people drink it very often. They drink it before, during and after meals and many more times during the day.
The tea leaves of green tea are the same as those of black tea. The biggest difference is that green tea leaves are unfermented while black tea leaves are fermented.
There are different types of green tea. The most popular green tea is called sencha. Powdered green tea is called matcha. Roasted green tea is called hojicha.