Use this to whip powdered
leaves of green tea (matcha)
and hot water.

How to make Japanese matcha tea with easy-to-use chasen:

Put a spoonful of matcha into a tea bowl. Then pour hot water on it halfway.
Matcha tea tastes a little bitter.
When you have it for the first time, put some milk or sugar in it to make it mild.

Do not twirl a chasen but shake it rapidly back and forth.
Shake it until the tea becomes frothy.

Matcha tea is a healthy drink because all of the nutrients of green tea are taken by drinking powered leaves. 
Matcha is made of strictly selected green tea leaves in a special method.It is one of the Japanese traditional drinks.