Kawane Tea Day is observed in Shizuoka Prefecture, Japan, every April 21. This holiday marks the beginning of the new tea season and promotes the high-quality tea produced in the Kawane region, which is known for its unique growing conditions, including mountainous terrain and significant rainfall. The celebration highlights the characteristics of Kawane tea, which is recognized for its flavorful brew and aromatic compounds. The Kawane Tea Industry Cooperative trademarked "Kawane-cha," and the Kawane Tea Road Promotion Council established this observance to attract tourists to the region. While tea was introduced to Japan in the eighth century, the Kawane area has been cultivating tea since the 13th century. Kawane tea is part of Shizuoka tea, considered one of Japan's highest-quality regional teas, alongside Uji-cha and Sayama-cha.