Why is matcha considered the “elixir for immortals” – Eisai?
It seems that originally matcha was very precious and produced in small quantities so that only nobility and shogun were able to drink it. However, in 1738 someone names Sohen Nagatani invented the uji green tea processing method. Another blog article, perhaps? This allowed for a more efficient process to create matcha. Now it was readily accessible to the general population and more people starting consuming matcha. Prior to this the general population would drink a drink called Bancha (Houjicha) which was brown in colour and much more bitter.