Denkōroku (伝光録, Record of the Transmission of the Light) is a kōan collection written in 1300 by Keizan Jokin Zenji, the Great Patriarch of Sōtō Zen Buddhism, based on approximately a year of his Dharma talks. The book includes 53 enlightenment stories covering 1600 or more years based on the traditional legendary accounts of Dharma transmission in the Sōtō lineage. Successive masters and disciples in the book are Shakyamuni Buddha circa 360 to 440 BCE in India, to Zen master Ejō in about 1230 or 1240 in Japan.