The Yamato court, concentrated in the Asuka region, exercised power over clans in Kyushu and Honshu, bestowing titles, some hereditary, on clan chieftains. The Yamato name became synonymous with all of Japan as the Yamato rulers suppressed the clans and acquired agricultural lands. Based on Chinese models (including the adoption of the Chinese written language), they developed a central administration and an imperial court attended by subordinate clan chieftains but with no permanent capital. By the mid-seventh century, the agricultural lands had grown to a substantial public domain, subject to central policy. The basic administrative unit was the county, and society was organized into occupation groups. Most people were farmers; other were fishers, weavers, potters, artisans, armorers, and ritual specialists.