The 645 coup reorganizes court power
Prince Naka no Oe and Nakatomi no Kamatari helped overthrow leading Soga figures in 645. Government had relied on aristocratic and status groups, while diplomacy introduced institutions from Tang China and peninsula states. New leaders sought stronger control over population, land and regional authority. Changes later associated with the Taika reforms developed through administration, surveys and personnel over time, as records and responsibilities gradually reorganized relationships with land, households and local leaders.
Registers connect households with administration
The court developed population registers, land and tribute arrangements, regional offices and communication routes. Continental models were adapted to established leaders and village relationships. Households supplied taxes, labour and provisions. Records allowed officials to estimate resources, while administration required literacy and training. Regional elites sometimes entered the new offices, retaining influence through negotiation and competition. The institutions consequently depended on existing social networks as authorities extended recordkeeping and central commands into local communities.
Reforms extend into the coded state
Institutions continued developing during the late seventh and early eighth centuries, including the Taiho Code of 701. Bureaucratic ranks, revenue and religious management became more organized, accompanied by capitals and state ceremonies. Regional resources and household circumstances shaped implementation. Political authority increasingly operated through written codes, offices and registration. Earlier elite networks adjusted within these structures, while taxes and service obligations affected the work and movement of ordinary households across the emerging state.