Why telling them apart matters
The matcha market is awash with products sold as «ceremonial» at bargain prices. Not all of them are frauds: some are decent matchas from a second harvest or a lower premium grade. The problem is paying a ceremonial price for a culinary product.
These five tests need nothing but your senses and a basic chasen.
Test 1: the dry colour in daylight
Tip 1 g of matcha onto white paper in daylight, not artificial light. A first-harvest ceremonial gives a pure jade green, almost bright, with no drift towards yellow or olive. Yellowish or dull tones are a clear sign of a late harvest, too much oxidation, or poor storage.
This test has a limit: a bright green can be produced artificially by adding colouring, a practice that exists in the low-cost market. The next tests complete the picture.
Test 2: the dry aroma
Open the tin once it is back to room temperature and smell the powder directly. A first-harvest ceremonial has a lively aroma: young pea, seaweed, sea air, almond milk. It is vegetal without being grassy or bitter.
If it smells of hay, old paper or dry grass, it has oxidised, or it was never ceremonial quality. If it barely smells of anything, it is probably a generic low-quality blend.
Test 3: solubility in cold water
Sift 1 g of matcha into a glass with 50 ml of room-temperature water. Stir with a spoon for 10 seconds. A fine powder (5 to 10 microns, as in a real ceremonial) disperses completely and gives an even green suspension. A coarse one, culinary and industrially milled, leaves visible particles at the bottom even after stirring.
Test 4: the foam
Sift 2 g of matcha into the chawan. Add 70 ml of water at 70 °C and whisk with an 80-prong chasen in Ws for 20 seconds. A genuine ceremonial forms a dense microbubble foam that holds for more than 60 seconds. If the bubbles are large and collapse within 15 to 20 seconds, the quality is low.
Test 5: the taste, plain
Drink the usucha you made in test 4, paying attention to the first impact, the development in the mouth and the finish. The sequence for a genuine ceremonial is: a sweet umami first impact (L-theanine) → a creamy development → a light, clean bitterness at the end → a long, sweet finish that can last several minutes. If the first impact is bitter, or the finish is short and dry, it is not a first-harvest ceremonial.