真しん正せい

na-adjective, noun which may take the genitive case particle 'no', noun

genuine; authentic; true; pure

Used for things that are real, not counterfeit or imitation. Often appears in formal or documentary contexts, such as 真正な文書 (authentic document) or 真正品 (genuine article).

• この署しょ名めいは真しん正せいなものと認みとめられた。

  This signature was recognized as genuine.

• 真しん正せいのパスポートを提てい示じしてください。

  Please present an authentic passport.