見 込(みこ)み違(ちが)い

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)み違(ちが)いだった。

That was a miscalculation.

売上(うりあげ)の見込(みこ)み違(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)に終(お)わると思(おも)っていたが、見込(みこ)み違(ちが)いで、予想(よそう)の3倍(ばい)の時間(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) + 違(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)み違(ちが)いだった: it was a miscalculation
大(おお)きな見込(みこ)み違(ちが)い: a major miscalculation
見込(みこ)み違(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
思(おも)い違(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

Related Words

Compare: 誤算(ごさん) (miscalculation)

Compare: 思(おも)い違(ちが)い (misunderstanding, mistaken belief)

Compare: 判断(はんだん)ミス (judgment error)

Compare: 見当違(けんとうちが)い (off the mark)

Related: 見込(みこ)む (to expect)

Compare: 計算違(けいさんちが)い (miscalculation)

general

Added 2026.4.5 12:39 · Revised 2026.9.2 13:02

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