SN wrote:
in supermarkets have you noticed that they don't put the Yamamotoyama
boxes with the tea? they usually put it in the asian food section next
to soysauce and noodles...

Well, the catchphrase on their website (http://www.yamamotoyama.co.jp/)
is "Yamamotoyama's tea and nori", so maybe what you see there is seaweed?

(Just kidding, unless they put nori in teabags nowadays ;-))

Stefan