Miso soup in the PM, Japanese green tea or "Hoji cha" in the AM. Hoji cha is green tea that has been roasted. It produces a rich nutty flavored brew. A nice change of pace from the lighter green, which can get monotonous on longer trips. I love coffee, but it is heavier and bulkier.
Also, it has a strong smell which can advertise a human's presence to bears. Don't know if they're coffee drinkers, but it sure let's 'em know you're around.