noun
discrepancy; mismatch; disagreement
Used when facts, opinions, data, or conditions do not match or are inconsistent. Common in formal and technical contexts.
報告書の数字に不一致が見つかった。
A discrepancy was found in the figures of the report.
両
There is a disagreement between the two parties' opinions.
矛盾 implies logical contradiction or inconsistency within a statement or system, while 不一致 is a broader term for any kind of mismatch or discrepancy.
Compound of the prefix 不 (fu, 'not') and 一致 (itchi, 'agreement, matching').