Jokan dealt with practical works such as producing Daijokanpu (official documents issued by the Daijokan) and Senji (imperial decree), comparing and examining the precedents and producing records for Kuji and Gishiki (political operations and ceremonies of the Imperial Court) and handling personnel affairs.
太政官符・宣旨などの公文書作成や太政官における公事・儀式の先例校勘・記録作成、人事案件の処理などの実務にあたり、太政官における事務方を担当した。