Here are a few tips for orientation:
Although the matcha tea in the 12th Century was invented in China, the original Matcha tea comes exclusively from Japan today. The best Matcha teas are still coming from the Uji region near Kyoto. Several factors such as cultivar of the tea plant, the shade before harvest, plucking and careful processing, including grinding in stone or ceramic mills, significantly affect the quality of tea. Prices from 22,00 to 26, 00 EUR for 30 grams Japanese Matcha powder is realistic. The better the quality of tea is the higher the price.
Very cheap Matcha fakes from China are becoming more common. In addition, there are also ground and other Sencha green tea powder. The powder looks like matcha tea from, but the quality of these teas is that the low-grade matcha again to wide after. You have the original Matcha Tea, Japan little in common.
The color of the powder is already an indication of the quality of the tea. High quality Matcha powder in a dry state shows a wonderfully bright jade green. After it was hit with the bamboo whisk, a dark, yet bright jade green should be seen. Lower grades look pale, sometimes yellowish or light brownish. In the lower grades are often tastes very bitter or sour in the aftertaste.
The aroma is fresh and lovely. Also a nice thick foam on the surface of tea is an indication of the quality and the freshness of the tea. Poor quality Matcha powder form no solid foam on impact.