Sûden was a Zen monk who acted as a religious advisor to Tokugawa Ieyasu and as a result played a notable role in that sphere in the foundation of the Tokugawa shogunate. Along with other scholars he drafted the Buke Shohatto for Tokugawa Ieyasu in 1615 and read the document before an assembly of daimyô at Fushimi that same year. In 1612 he was tasked with composing a letter to the governor of New Spain inviting Spanish trade. At Ieyasu’s funeral in 1616 he acted as an overseer of ceremonies, along with Tenkai and Bonshun.
- Initial text from Samurai-Archives.com FWSeal & CEWest, 2005