noun
truthfulness; authenticity; credibility
Refers to the quality of being true, genuine, or faithful to facts. Often used in formal or evaluative contexts such as assessing statements, documents, or claims.
この証言の真実性を疑う理由はない。
There is no reason to doubt the truthfulness of this testimony.
文書
We asked an expert to verify the authenticity of the document.
信憑性 emphasizes reliability or trustworthiness, often of information or a source, whereas 真実性 focuses on factual truth or genuineness.
Compound of 真実 (shinjitsu, 'truth') and 性 (-sei, '-ness, -ity'), forming an abstract noun meaning 'truthfulness' or 'authenticity'.