Keicha Grows Your Matcha. Keicha Tea World is Japan’s leading Manufacturer of superior quality matcha, hojicha and green tea with a history spanning over 80 years. Keicha has one of the largest Matcha production capacities in Japan with partner factories in both Kagoshima, the largest organic Matcha farming region, and Kyoto, where world-renowned matcha is produced. Offering bulk, custom blends, and extensive private label services.