In response to an inquiry from the second shogun, Hidetada TOKUGAWA, Tenkai suggested that myojin was a title of god donated to Hideyoshi TOYOTOMI as Hokoku Daimyojin (Great Luminous Deity of Our Bountiful Country) and it was an ill-omened title considering the collap of Toyotomi clan, so the title of god of Ieyasu was determined to be 'Tosho Daigongen', and the body of Ieyasu was moved from Mount Kuno Toshogu Shrine to Nikko Toshogu Shrine and Rinno-ji Temple was built.
天海が2代将軍となった徳川秀忠の諮問に対し、明神は豊国大明神として豊臣秀吉に対して送られた神号であり、その後の豊臣氏滅亡を考えると不吉であると提言したことで、家康の神号は「東照大権現」と決定され、家康の遺体を久能山東照宮から日光東照宮に改葬、輪王寺を建立した。