Satori is a Japanese Buddhist term for awakening, "comprehension; understanding". It is derived from the Japanese verb satoru. In the Zen Buddhist tradition, satori refers to a deep experience of kenshō, "seeing into one's true nature". Ken means "seeing," shō means "nature" or "essence". Satori and kenshō are commonly translated as enlightenment, a word that is also used to translate bodhi, prajñā and Buddhahood.
Satori means the experience of awakening ("enlightenment") or apprehension of the true nature of reality. It is often considered an experience which cannot be expressed in words. While the term satori is derived from the Japanese verb "to know" (satoru), it is distinct from the philosophical concept of knowledge as it represents a transcendence of the distinction between one that knows and knowledge.
Zen is a school of Mahayana Buddhism that originated in China during the Tang dynasty, known as the Chan School, and later developed into various sub-schools and branches
The term Zen is derived from the Japanese pronunciation of the Middle Chinese word chán, an abbreviation of chánnà, which is a Chinese transliteration of the Sanskrit word dhyana ("meditation"). Zen emphasizes rigorous self-restraint, meditation-practice, insight into the nature of mind and nature of things (without arrogance or egotism), and the personal expression of this insight in daily life, especially for the benefit of others. As such, it de-emphasizes knowledge alone of sutras and doctrine, and favors direct understanding through spiritual practice and interaction with an accomplished teacher or Master.