Suden administered the affairs of the bakufu, moving between Nanzen-ji Temple (Konchiin Subtemple) and Konchiin Temple in Edo, and both he and Tenkai were called Prime Minister in Black Robes.
南禅寺(金地院)と江戸の金地院を往還しながら政務を執り、天海と共に黒衣の宰相と呼ばれた。