All Ritsuryō

Ritsuryō was the historical legal system of premodern Japan, built on codes of criminal law (ritsu) and administrative or civil regulation (ryō) that Japanese rulers adapted from Tang dynasty Chinese legal and bureaucratic models beginning in the seventh century. The system took shape through a sequence of major promulgated codes rather than a single unified document: the Asuka Kiyomihara Code issued under Emperor Tenmu and Empress Jito around 689, the Taiho Code completed in 701 under Emperor Monmu, and the Yoro Code compiled from about 718 and formally enacted in 757, each revising and elaborating the one before it while keeping the same Chinese-derived structure of a penal code paired with an administrative code. Ritsuryō law established a centralized state bureaucracy under the tenno, a system of court ranks, a land allocation and taxation scheme, and criminal penalties graded by the Five Punishments framework borrowed from Chinese practice. Its formal authority gradually eroded from the tenth century onward as private landed estates, warrior governance, and customary law displaced strict code administration, though ritsuryō titles, offices, and legal vocabulary persisted symbolically for centuries afterward. The system is studied today as the founding framework of Japan's premodern legal and administrative history and the channel through which continental East Asian legal concepts entered Japanese governance.