In a significant archaeological discovery, researchers have uncovered remains of a fence believed to date back to the latter half of the 7th century, suggesting the existence of a central government complex during Japan's Asuka period. This finding was announced by the Nara National Research Institute for Cultural Properties, indicating that central administrative institutions and related facilities may have been developed under the reigns of Emperors Temmu and Jitō. The excavation site, located about one kilometer north of the Asuka-kyō palace where these emperors conducted state affairs, is particularly noteworthy as it aligns with the hypothesis of an extensive bureaucratic system being established in the early Japanese state.

The excavation has been ongoing since 1981, following earlier significant discoveries made in the early 1900s. The current exploration focuses on an area approximately 250 square meters east of the Shikigami ruins, where eight rectangular postholes were identified. Seven of these postholes were found to be evenly spaced, indicating a deliberate architectural plan. This shapes the understanding of the spatial organization of governmental activities during the Asuka period, hinting at sophisticated administrative practices.

Moreover, this discovery contributes to broader efforts to register the Asuka-Fujiwara capital as a UNESCO World Heritage site by summer 2026. Researchers aim to preserve historical sites such as the Shikigami ruins and engage with local communities to explore and document lesser-known aspects of Japan's ancient history, thereby enriching the cultural narrative surrounding this significant period.