I have heard that storie before, but I don't remember the part about it helping him concentrate. Although I might have, and back at the time I only drank black teas, and never knew about those qualities of green teas.
Anyway, my order of tea from Adagio came today, and it came with a free book. It had the same storie, only it was quite different. IN the book, it said that Buddha took a vow to stay up so many nights, and eventually fell asleep. When he woke up, he found out that he had cut of his eyelids, and there was a plant where the eyelids were. He ate the leaves and they gave him energy. He then took the tea to China.
*Sips Hojicha for the first time*