[bnelson44]

No, Zen is Buddhism.

[Lochlainnach]

No, that is called Zen Buddhism. Buddhism has its own constructs and beliefs. Zen has others. Zen does not pose a belief in reincarnation as Buddhism does. Zen does not pose that Jesus was resurrected as Christianity does. Yet a Christian can practice Zen.

There is a Tibetan Buddhism and Zen Buddhism. In Zen we can experience Nirvana on earth; Buddhism, or most believers of Buddhism (from what I understand) think Nirvana a place more akin to the Christian notion of Heaven. The teachings of the Buddha are not the teachings of Zen Masters. Buddhism is a religion. Zen is not, but an aspect of thought and practice that, for some Buddhists, has been incorporated into ritual and thought.