How to say "misconception" in Japanese

• 思い違いおもいちがいCommon
  noun, suru verb, intransitive verbCovers the everyday sense of 'misconception': a false impression or wrong idea a person holds about something. Typical when someone has simply got the facts wrong and you want to point out or correct that mistake.
  彼かれは思い違おもいちがいをしているらしい。↗

  It appears that he is mistaken.
• 錯覚さっかくJLPT N1approx.Common
  noun, suru verb, transitive verb, intransitive verbAlso renders 'misconception', with a nuance of being under a delusion or illusion — a false perception one is taken in by. Suits cases where the wrong belief feels deceptive or illusory rather than a mere factual slip.

Use 「思い違い」 for an ordinary mistaken belief or wrong idea someone holds; use 錯覚 when the emphasis is on being deceived or on an illusion-like false perception.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 思い違いおもいちがいmisunderstanding
• 迷想めいそうdelusion
• 誤信ごしんmistaken belief
• 錯覚さっかくmisapprehension