Japanese Uji-Kabane System

Timeline

1. 501–530Yamato Province · YamatoIn the early 6th century, with the Yamato court at the center of the Japanese archipelago, provincial magnates used uji (such as the Soga, Mononobe, and Nakatomi) as kinship and political units, hereditarily holding miyake and shōen (estates) and undertaking military and ritual functions; uji names marked family affiliation and spheres of influence recognized by the court.
2. 530–570Yamato court · YamatoThe court granted magnates kabane to indicate rank, such as sukune, omi, muraji, kimi, and kimi; kabane were not surnames but political titles, determining court audience order, official qualifications, and foreign designations, forming a hierarchical system using both uji and kabane.
3. 572–587Yamato · YamatoSoga no Iname used the uji-kabane system to expand power, fiercely contending with the Mononobe over the acceptance of Buddhism and imperial succession; after the Hinoko Rebellion (587) the Soga prevailed, showing that controlling kabane grants and court appointments had become the core means of vying for national dominance.
4. 592–600Asuka · AsukaDuring the reign of Empress Suiko and the regency of Prince Shōtoku, the uji-kabane system remained the basic framework for the court to organize magnates; diplomatic activities such as the missions to Sui also used uji-kabane titles to identify envoys, and the system continued to maintain aristocratic order before the introduction of the ritsuryō system.