[1] The Cabinet Office was established on 6 January 2001, following the reorganization of the central government.

Many important policy issues require cross-ministerial responses and since the establishment of the Cabinet Office they have delt with many different matters.

The Cabinet Office's presence has increased, such as its jurisdiction over certified children's educational institutions.

[4] The number of Ministers of State for Special Missions has increased from 6 at the beginning of the Cabinet Office, to 10 as of September 2020.

of the Important Policy of the Cabinet" was enacted, and future transfer of work to each ministry was established.