This is the 8861st most frequent Japanese word.
極秘
Top secret.
極秘 is used here to denote the confidentiality status of the project, emphasizing its high level of secrecy.
このプロジェクトは極秘ですので、外部に漏らさないでください。
This project is top secret, so please do not disclose it to outsiders.
極秘 highlights the sensitive and confidential nature of the information being referred to.
彼は会社の極秘情報を知っている。
He knows the company's classified information.
極秘 is used to describe the secrecy level of the documents, identifying them as highly classified.