noun
well-informed person; person in the know
Refers to someone who is knowledgeable about a particular field or current events, often implying they have inside or up-to-date information.
彼はIT業界の情報通だ。
He is well-informed about the IT industry.
情報通の友達から、新製品の
I heard a rumor about the new product from a friend who is in the know.
Compound of 情報 (information) and 通 (expert, connoisseur). The suffix 通 is commonly attached to nouns to indicate a person well-versed in that area.