The Japanese tea ceremony is a multifaceted traditional activity based on Taoism (Daoism) and influenced by Zen Buddhism, in which powdered green tea, or matcha , is ceremonially prepared and served to others.
The get-togethers for chanoyu are called chakai (literally ""tea meeting"") or chaji (literally ""tea function""). Usually the term chakai is used to refer to a relatively simple course of hospitality that includes the service of confections, usucha (thin tea), and perhaps tenshin (a light snack), while the term chaji refers to a more formal course of hospitality including kaiseki (a special kind of full-course meal), confections, koicha (thick tea), and usucha (thin tea). A chaji may last up to four hours.

A tea practitioner should strive to be knowledgable if not expert in the wide range of disciplines and traditional arts that are integral to chanoyu -- for example, the production and types of tea, kimono, calligraphy, flower arranging, ceramics, and incense -- in addition to his or her school's tea practices. Because of this, the study of the tea ceremony is virtually endless.Even to participate as a guest in a formal tea ceremony requires knowledge of the prescribed gestures and phrases, the proper way to take tea and sweets, and general deportment in the tea room.

The Japanese tea ceremony is a traditional ritual based on Taoism (Daoism) and influenced by Zen Buddhism in which powdered green tea, or matcha , is ceremonially prepared by a skilled practitioner and served to a small group of guests in a tranquil setting. Chaji is a full tea presentation with a meal. As in virtually every tea ceremony, the host may spend days going over minutiae to insure that this ceremony will be perfect. Through tea, recognition is given that every human encounter is a singular occasion which can, and will, never recur again exactly. Thus every aspect of tea must be savored for what it gives the participants.

Chanoyu which means “hot water for tea” refers to a single ceremony that involves only tea, while the longer version known as Chaji “tea meeting” entails a full tea ceremony in which a light meal is also served, and can last up to four hours. Mastering the art of the tea ceremony includes years of study that can last a lifetime, as the student must be familiar with several interrelated disciplines such as flower arranging, calligraphy, ceramics, incense, and the proper technique for wearing kimono. Guests who participate in the ritual must also be aware of the proper conduct in regard to utilizing certain phrases and gestures required to maintain the integrity of the ceremony.

If tea is to be served in a tea house guests will initially be shown to a waiting room called a machiai, which is usually a separate structure such as a simple gazebo. After being summoned by the host they purify themselves by rinsing their mouths and hands with water from a small stone basin known as tsukubai, and then continue through the garden to the tea house. Removing their shoes they proceed through a small sliding door that is only thirty six inches high, thus symbolizing that all who enter are equal in stature irrespective of status or social position. The roomis not decorated save for a scroll painting called kakemono, which has been selected by the host and reveals the theme of the ceremony. The Buddhist scripture on the scroll is called bokuseki (ink traces) and is admired by each guest in turn before being seated seiza style on the tatami mat floor.

If a meal is not served the host will present each guest with small sweets eaten from special paper known as kaishi, which each person carries in a decorative wallet tucked in the breast of the kimono. All utensils to be used in the ceremony such as tea bowl, tea scoop, and whisk, are ritualistically cleansed in the presence of the guests in a precise manner and order before being fastidiously arranged according to the ceremony being performed. Upon completion of cleaning and preparing the utensils, the host will place a carefully measured proportion of green tea powder in a bowl along with the appropriate amount of hot water, and then whisk the tea using a precise set of movements. Guests relax and enjoy the atmosphere of the simple surroundings and conversation is kept to a minimum. The host then serves the bowl to the guest of honor, bows are exchanged, and the bowl is raised to the host in a gesture of respect. The bowl in then rotated by the guest to avoid drinking from it's front, a sip is taken followed by a prescribed phrase, the bowl's rim is wiped and rotated back to its original position, and is then passed on to the next guest with a bow. The protocol is repeated until all guests have tasted the tea from the same bowl, and it is then returned to the host who rinses it. The scoop and tea container are then offered to the guests for examination, each item being treated with extreme care and reverence as they may be irreplaceable handmade antiques passed down for generations.

At the conclusion, the guests express their appreciation for the tea and admiration for the art of the host. They leave as the host watches from the door of the teahouse.