Part 1, Daj̄o Ruiten, includes typical materials compiled by the records section of Dajokan, the Cabinet of the Meiji government. It consists of fair copies of various regulations selected from cabinet diaries, daily journals, public records (K̄obun Roku), etc., and is classified into 19 categories dealing with such topics as systems, government organization, official rules, ceremonies, and so forth. The documents are arranged in chronological order, starting in October of the third year of the Keio era (1867) and ending in the 14th year of the Meiji era (1881)

Part 2, K̄obun Ruij̄u, was previously edited under the Daj̄o Ruiten title, and took its present title in 1882. Aside from some special categories, it is arranged in chronological order and classified into 23 categories ranging from the system of government to foreign affairs. Starting in 1886, it consists principally of the original documents of laws and regulations.