Then, Kokuga reorganized the rules of the koden implementing the following system: Kori (district, a unit of 2-20, 50-home neighborhoods or townships, in the Ritsuryo period), Ho (district, a unit of 5-home neighborhoods or townships, in the Ritsuryo period), Go (district, a unit of 50-home townships [comprised of 2-3 neighborhoods], in the Ritsuryo period), and Jo (a unit or a system to divide lands in the Ritsuryo period).
これを、郡・保・郷・条などの支配単位に再編成した。