Oi Ocha is a popular brand of bottled green tea produced by Ito En, a Japanese beverage company. Known for its refreshing taste and high-quality ingredients, Oi Ocha is made from carefully selected tea leaves, ensuring a rich flavor that appeals to tea lovers. The brand offers various types of green tea, including unsweetened and lightly sweetened options. Oi Ocha is widely available in Japan and has gained international recognition, making it a favorite choice for those seeking authentic Japanese green tea experiences.