noun
Wasei-eigo noun meaning a mismatch or inconsistency between things that should match, such as data, appearance, or expectations.
wasei-eigo (Japanese-coined English), from unmatch
データにアンマッチが見つかった。
A discrepancy was found in the data.
彼の話と証拠の間にアンマッチがある。
There is a mismatch between his story and the evidence.