Founder of Saiganden Temple who recited the Lotus Sutra constantly and enshrined the eleven-faced Kannon in a hermitage on the mountain which would become the temple's main hall.

"Tokushi" is a title given to a monk one rank below that of lecturer.

Stories say that Saiei was either a monk from the Buddhist kingdom of Tianzhu (India), who received a behest from Emperor Shoumu to ascend to the top of Mount Aso and receive Takeiwatatsu-no-mikoto or that he was a disciple of Ryougen of Mount Hiei.