The kaigun (navy) agency was established by introducing the presidency (roju [member of shogun's council of elders]) system to the central organization of bakufu, and the president of kaigun coequal to roju (member of shogun's council of elders) was additionally placed in the existing organization of kaign.
幕府中枢への総裁江戸幕府の総裁制度導入により海軍局が設置され、従来の海軍組織の上に乗るかたちで老中格の海軍総裁が置かれた。