noun, noun which may take the genitive case particle 'no'
secretiveness; cult of secrecy
Describes a person, organization, or policy that keeps things hidden or avoids disclosure. Often used critically.
That company is secretive, and almost no internal information gets out.
政府の秘密主義的な対応に批判が集まった。
The government's secretive response drew criticism.
Compound of 秘密 (secret) and 主義 (principle, -ism). The exact historical derivation is uncertain, but the word follows a common pattern for abstract attitudes.