A unitary system is a form of government where power is concentrated in a central authority. In this system, the national government holds the primary authority, and any regional or local governments derive their powers from it. This means that the central government can create, modify, or abolish local governments as it sees fit. Countries like France and Japan operate under unitary systems, where laws and policies are uniformly applied across the entire nation. While this can lead to more consistent governance, it may also limit the autonomy of local governments, making it challenging for them to address specific regional needs effectively.