Chasen is one of the utensils of the Japanese tea ceremony. It is a bamboo whisk to mix matcha with hot water evenly in a bowl and make it foamy. There are about 120 kinds of chasen with variety of shapes, materials and the number of ears at the head. Which chasen to select depends on a school of tea ceremony or a tea master’s preference. Basically there are two kinds of chasen; Kazuho, which has thin and sparse ear at the head, is used for usucha (thin tea), while Araho, which has thick and dense ear at the head, is used for koicha (thin tea). To use a chasen in a formal manner, one holds a chawan (tea bowl) with the non-dominant hand and holds a bamboo handle of chasen with a thumb, the index finger and the middle finger of the dominant hand. Here, we can see emphasis on the formal beauty that is in common with calligraphy. Chasen is an indispensable tool for Japanese tea ceremony culture.