Just watched the youtube video - and I'm very concerned. I drink Yuuki-cha tea every day - both matcha and sencha. Tho not the matcha tested.
Some thoughts - I wonder who that is doing the testing in the video. Is the testing legit (where were the baselines for the container he was using, the foil, the wood, the immediate environment (there was strong wind in the mic - so outside?! seems hardly a well controlled environment).
Truth is I am prone to a bias because I love green tea so much, so there is a danger of my wanting so badly for the tea to be safe.
I wish I understood the testing process and data and the graphs so that I could be more discerning.
edkrueger - could you explain your comments? I don't understand what you're saying? (who's hypothesis that radiation is zero? what is an 80% confidence level? what is the significance of the SD being higher than the mean? and what do those numbers mean, what do we compare them to regarding "safe" levels?
Now I'm stressed, and I'm going to go drink my matcha Tenkei-Tori now, probably staring into it with some concern.