Dōgen Kigen (1200–1253 ce) is one of the most revered figures in the history of Japanese culture. A Zen master regarded by the Sōtō School as its spiritual founder, Dōgen is also considered by many to be Japan's greatest philosopher. (The other major contender is kūkai, with whose philosophy Dōgen's shares a number of features.) Possessed of a prodigious and subtle intellect, and master of a strikingly poetic style, he surely ranks among the world's most formidable thinkers.