I lectured on tea ceremony of Kuchikiri for junior high and high school students. The tea ceremony of Kuchikiri is considered the most important tea ceremony for tea master from a long time ago. The host cuts the mouth of Chatsubo (tea pots) with tea leaves in front of guests with a knife and takes out the tea leaves. Then host grinds the tea leaves with chausu (tea grinding handmill) in the tea ceremony, and all the guests drink the matcha. I instructed the students on this series of story and rules.