In 1017 Keiso performed Hokke Juko (lectures on Hoke-kyo Sutra in eight volumes, Kai-kyo [sutra read before the main sutra] and Kechi-kyo [sutra read after the main sutra]) at a memorial service for Enchin.
寛仁元年（1017年）の円珍忌に法華十講を行った。