Eihei Dogen was a Japanese Buddhist monk who lived from 1200-1253. He is best known as the founder of the Soto Zen school of Buddhism in Japan. Dogen was born into a noble family and received a traditional education, but at a young age, he became disillusioned with the materialistic society of his time and sought a deeper understanding of life.

At the age of 13, Dogen began studying Buddhism under the guidance of Myozen, a Zen master. He was deeply influenced by the teachings of Chinese Zen master Rujing, who emphasized the practice of zazen (sitting meditation) as the path to enlightenment. Dogen devoted himself to the practice of zazen and eventually became Rujing's successor.

In 1223, Dogen traveled to China to further his studies and deepen his understanding of Zen. He spent two years studying under various masters and returned to Japan with a new perspective on Buddhism. Dogen believed that the true practice of Zen was not just about meditation, but also about bringing that awareness and mindfulness into every aspect of daily life.

In 1236, Dogen established his own monastery, Eiheiji, in the mountains of Japan. He emphasized the importance of community and communal living in the practice of Zen. His teachings focused on the idea of "just sitting," where one simply sits in meditation without seeking any particular goal or outcome. Dogen believed that through this practice, one could experience the true nature of reality and attain enlightenment.

Dogen's teachings were not always well-received by the established Buddhist schools of his time, who saw his emphasis on zazen as a threat to their authority. However, Dogen's influence continued to grow, and he attracted many followers who were drawn to his unique approach to Zen.

Today, Dogen is considered one of the most influential figures in Japanese Buddhism. His writings, particularly his main work "Shobogenzo," are still studied and revered by Zen practitioners around the world. Dogen's emphasis on the practice of zazen and the integration of Zen into daily life continues to be a central aspect of the Soto Zen tradition.

In conclusion, Eihei Dogen was a highly influential Buddhist monk who founded the Soto Zen school of Buddhism in Japan. His teachings on zazen and the integration of Zen into daily life continue to inspire and guide practitioners on the path to enlightenment.