information isolation; closed to outside information
Describes a country, organization, or system that deliberately restricts or blocks the flow of information from the outside world, likened to the historical 鎖国 (sakoku) policy. Often used in political or technological contexts.
Because that country maintains information isolation, news from abroad hardly comes in.
An information isolation policy risks restricting citizens' right to know.
鎖国 refers to the historical national isolation policy of Japan. 情報鎖国 extends this metaphor to the modern context of information control.
Compound of 情報 (jōhō, 'information') and 鎖国 (sakoku, 'national isolation'). The term draws a parallel between historical isolationism and modern restrictions on information flow.