Linked from
The 18 pages that link to Ritsuryō, each with the reason it gives.
Taika ReformNarrower topic: The reform is often treated as an early step toward the ritsuryō state.
Taihō CodeNarrower topic: The Taihō Code is a foundational example of this governing system.
YōrōNarrower topic: The Yōrō Code formed part of the ritsuryō framework governing the state.
KeiunNarrower topic: Keiun fell within the consolidation of ritsuryō institutions.