mix-up; mistake
Refers to confusing one thing for another, especially physically taking or handling the wrong item. Often used in contexts like luggage, documents, or similar objects.
A suitcase mix-up occurred at the airport.
Please be careful not to mix up the documents.
Used when someone misinterprets or mistakes the meaning of something said or written. Less common than 勘違い (かんちがい) for general misunderstandings.
The meeting got confused due to a misunderstanding of his words.