SuGoiSuす語彙すGrammar › N1 · 12 Inference and judgment
〜と言っても過言ではない: it is no exaggeration to say
N1 · 12 Inference and judgment
Says a bold statement is still a fair description, not an overstatement.
Plain form + と言っても過言ではない (also 〜と言っても言い過ぎではない). Used for emphasis in praise or strong claims. Formal; common in articles and ads. The claim is a positive or striking fact.
Examples
彼は、世界一のピアニストと言っても過言ではない。
It is no exaggeration to say he is the world's best pianist.
この発明が、社会を変えたと言っても過言ではない。
It is no exaggeration to say that this invention changed society.