Oi Ocha Is Japan 'S No. 1 Green Tea Brand And It Means ''Tea, Please! ''. Made By Ito En, Japan 'S Foremost Tea Purveyor, Our Unsweetened Green Tea Is Brewed From Prime, First Flush Tea Leaves Harvested In Spring. Using Decades Of Green Tea Expertise, Our Classic Oi Ocha Unsweetened Green Tea Brings You The Most Refreshing And Authentic Green Tea Taste In The Iconic Green Bottle.About Ito Enito En Is The World 'S Premier Green Tea Company And Innovator Of Healthy Beverages Dedicated To Creating Authentic Products That Embody The Company 'S Five Principles Of Natural, Healthy, Safe, Well-Designed And Delicious. Established In Japan In 1966, Ito En Is Specifically Known For Its Commitment To Tea Expertise And High Quality Standards That Are Reflected Across All Of Its Award-Winning Brands-Teas ' Tea Organic, Oi Ocha, And Matcha Love. Dedicated To Authenticity While Creating Global Innovation For The Beverage Industry, Ito En Is Ranked As One Of ''50 Companies Changing The World ''(Fortune) For Its Commitment To Sustainability And Promoting A Healthier Lifestyle.