When the ritsuryo legal code system was introduced to Japan and Daijokan was established to preside over the eight ministries, Giseikan, the policy-making branch of Daijokan, was especially called 'Taikaku' during Chinese Tang.
日本でも律令制が導入されて太政官が八省の上に置かれると、政策決定機関である議政官のことを特に唐名で「台閣」（たいかく）と呼ぶようになった。