A tea whisk (chasen, 茶筅) is a tool used to uniformly mix powdered green tea and hot water. For beginners in tea ceremony, it is better to use a tea whisk with 80 or 100 prongs. 80 to 100 tea whisk are easy to contain air in the tea, suitable for light tea. More than 120 tea tea whisks are suitable for mixing thick tea and require some tips to use, so it is suitable for slightly advanced users.