A: Matcha is Camellia Sinensis, the same as other type of green tea, but grown in shade. Less sun exposure increases Caffeine and L-theanine in the tea leaves. In order to grow Matcha, higher in Caffeine and L-theanine, tea farmers need to put black shades all over the tea fields.
That's why there is no "decaffeinated Matcha" in tea industry--it doesn't make sense to remove caffeine after extra effort was made to increase caffeine. Yes, "Matcha" is supposed to be high in Caffeine. High Caffeine content was welcomed by Zen monks and Samurai warriors to stay alert. read more on Matcha
However, when Camellia Sinensis is grown in full sun and the tea leaves are steamed immediately after harvest to stop oxidation, the tea leaves are called Sencha. Grown in full sun, Sencha has more antioxidants, less caffeine, and less L-theanine than Matcha. Sencha Powder can be called as "Matcha with less caffeine," if "Matcha" term is used as a synonym of "green tea powder."
Although Sencha Powder is already low in Caffeine, we use patented water method decaffeination process and remove almost all the caffeine from sencha leaves and make our decaf green tea powder.
Find more about Decaffeinated Edible Green® Sencha Powder.