[E]ven while the Daitokuji was in ashes, the basis for its recovery an — Kaso Sodon

"[E]ven while the Daitokuji was in ashes, the basis for its recovery and expansion was being laid by the monks Yoso Soi (1376- 1458) and Ikkyu Sojun (1394-1481). Both Yoso and Ikkyu began their Zen training in gozan monasteries. But like growing numbers of monks in the late fourteenth and fifteenth centuries, they quickly became dissatisfied with what they perceived as the formalism, and aestheticism of the official monasteries and so turned to masters of the Daio school like Kaso Sodon (1352-1428) for training in a more rugged Zen."