Koyu Matcha are a Tea company based in Dublin, Ireland. They supply organic matcha green tea to Ireland, the UK and Sweden. So far…. The amount of studies on the health benefits of green tea consumption has exploded in recent years. With good reason. Green tea is proving to be effective against a whole host of illnesses and conditions. Eisai, the monk who brought tea to Japan said that it was “the elixir of the immortals. Wherever tea seeds are planted, long life is sure to follow”.