I have no clue, but I think I want to clarify what Poohblah said. It is not "Tea" as in tea from the Camillia Sinensis plant. It likely is some sort of Herbal Tisane. That is what really opens it up to be a whole gamut of things. Herbalists can get a little crazy with throwing a bunch of stuff together and calling it a tea that will help you with X, Y, and Z.
*Edit: On another note, if you are adamant that the leaves in there are actually from the tea plant, it could be a type of Korean Grain and Tea Leave blend. Though they do not look quite like a roasted Barley which is common in Korea. It could be some other grain though.