Way back when, I used to teach English to a Japanese businessman. He would always offer me one of his many varieties of tea. One of my favorite was made from a green tea powder, which was put into a cup, hot water was added to it, and the two ingredients were whisked together with a minature bamboo whisk–like maybe 2 or 3 inches in length. He called it a “green tea espresso,” as it was a rather concentrated concoction.
What is this stuff I drank called? And is it pretty common so that I could find it at the local Asian markets?