"Tencha" is tea leaves that has not yet been ground into powder as matcha, and tencha itself is not often seen on the market.
The leaf has be shaded for at least 21 days before being plucked by hand.Then, ground by stone mill into powder, which is then called "matcha". Nowadays, matcha is everywhere, but authentic matcha is not just a powder tea.
A bowl of brewed Tencha has a green note of cut grass with a nice Umami flavor with a smooth and round texture.