(みこ)(ちが)

みこみちがい
noun
misjudgment; wrong assumption
1. misjudgment; miscalculation; wrong assumption; mistaken expectation
A situation where one's prediction, expectation, or assessment turns out to be wrong. Often used when plans fail because the initial assumptions were incorrect.
それは見込(みこ)(ちが)いだった。
That was a miscalculation.
売上(うりあげ)見込(みこ)(ちが)いで赤字(あかじ)になった。
We went into the red due to a miscalculation of sales.
簡単(かんたん)()わると(おも)っていたが、見込(みこ)(ちが)いで、予想(よそう)の3(ばい)時間(じかん)がかかった。
I thought it would be finished easily, but my estimate was wrong and it took three times longer than expected.

Composed of 見込(みこ)み (expectation, estimate, prospect) + (ちが)い (difference, mistake). Used when someone's prediction or judgment about a situation, person, or outcome turns out to be incorrect.

COMMON COLLOCATIONS:

  • 見込(みこ)(ちが)いだった: it was a miscalculation
  • (おお)きな見込(みこ)(ちが)い: a major miscalculation
  • 見込(みこ)(ちが)いをする: to make a wrong assumption

SIMILAR WORDS:

  • 誤算(ごさん): miscalculation — more formal, often used in strategic or business contexts
  • (おも)(ちが)い: misunderstanding, mistaken belief — focuses on incorrect understanding rather than prediction
  • 判断(はんだん)ミス: judgment error — uses the loanword ミス for a more modern feel
  • 見当違(けんとうちが)い: off the mark — implies looking in entirely the wrong direction