From wikipedia dogen wikipedia
Dōgen Zenji (道元禅師; 19
January 1200 – 22 September 1253),[1] also
known as Dōgen Kigen (道元希玄), Eihei Dōgen (永平道元), Kōso
Jōyō Daishi (高祖承陽大師),
or Busshō Dentō Kokushi (仏性伝東国師), was a Japanese Buddhist priest and founder of the Sōtō school
of Zen in Japan.
Originally ordained as a monk in the Tendai
School in Kyoto, he was ultimately dissatisfied with its teaching. His main cocern and
traveled to China to seek out what he believed to be a more authentic Buddhism.
He remained there for five years, finally training under Tiantong Rujing,
an eminent teacher of the Chinese Caodong lineage.
Upon his return to Japan, he began promoting the practice of zazen (sitting
meditation) and wrote some books about zazen. Fukan zazengi and Bendōwa.
He eventually broke relations completely with the powerful
Tendai School, and, after several years of likely friction between himself and
the establishment, left Kyoto for the mountainous countryside where he founded
the monastery Eihei-ji, which remains the head temple of the Sōtō school
today.
Dōgen is known for his extensive writing including his most
famous work, the collection of 95 essays called the Shōbōgenzō, but also Eihei Kōroku,
a collection of his talks, poetry, and commentaries, and Eihei Shingi, the
first Zen monastic code written in Japan, among others.
Dogen's early years