Zen Buddhism was a primary influence in the development of the Japanese tea ceremony. A chakai is a relatively simple course of hospitality that includes confections, thin tea, and perhaps a light meal. A chaji is a much more formal gathering, usually including a full-course kaiseki meal followed by confections, thick tea, and thin tea. A chaji may last up to four hours.
Japanese tea ceremony
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Leadership is both a research area, and a practical skill encompassing the ability of an individual, group or organization to "lead", influence or guide other individuals, teams , or entire organizations. Often viewed as a contested term,  specialist literature debates various viewpoints, contrasting Eastern and Western approaches to leadership, and also within the West North American versus European approaches. Studies of leadership have produced theories involving traits ,  situational interaction, function, behavior,  power , vision and values ,  charisma , and intelligence, among others. In the field of political leadership, the Chinese doctrine of the Mandate of Heaven postulated the need for rulers to govern justly and the right of subordinates to overthrow emperors who appeared to lack divine sanction. Pro- aristocracy thinkers  have postulated that leadership depends on one's "blue blood" or genes. On the other hand, more democratically inclined theorists have pointed to examples of meritocratic leaders, such as the Napoleonic marshals profiting from careers open to talent. Feminist thinking, on the other hand, may object to such models as patriarchal and posit against them "emotionally attuned, responsive, and consensual empathetic guidance, which is sometimes associated [ by whom?
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Albert Einstein was a German mathematician and physicist who developed the special and general theories of relativity. In , he won the Nobel Prize for physics for his explanation of the photoelectric effect. In the following decade, he immigrated to the U.