noun
firsthand information; primary source
Refers to information obtained directly from the original source, not through intermediaries. Common in research, journalism, and business contexts.
記者は一次情報を確認してから記事を書いた。
The reporter wrote the article after verifying the firsthand information.
研究には一次情報が不可欠だ。
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).