firsthand information; primary source
Refers to information obtained directly from the original source, not through intermediaries. Common in research, journalism, and business contexts.
The reporter wrote the article after verifying the firsthand information.
Primary sources are essential for research.
二次情報 is secondhand or processed information, while 一次情報 is original, unmediated data.
Compound of 一次 (primary, first-order) and 情報 (information).