Green tea is the number 1 tea in Japan and an integral part of Japanese culture. It was first introduced by Buddhist monks from China in the 9th century, and since then, it has become a staple in Japanese households. Green tea is made from the leaves of the Camellia sinensis plant and is known for its health benefits, including preventing cancer and heart disease. There are several varieties of green tea available in Japan, with sencha being the most popular. Traditional Japanese tea ceremonies are elaborate affairs that involve carefully choreographed movements and rituals. Tea houses are also popular in Japan, where people can enjoy a cup of tea while relaxing or socializing.