How to say "ignorance" in Japanese
Choosing the right word
- 無知むちnoun, na-adjectiveThe default word for ignorance as simple lack of knowledge or awareness, and it can also suggest innocence or stupidity. Use it for neutral statements such as describing someone's ignorance of a subject.
- 蒙もうnounA rare, literary word meaning ignorance in the sense of being unenlightened or uninformed. It is seldom the word you want in ordinary speech or writing; learners will almost always want 無知 instead.
- 不案内ふあんないna-adjective, nounCovers ignorance as unfamiliarity or inexperience rather than blank lack of knowledge — not knowing one's way around a place, field, or procedure. Natural when admitting you are unfamiliar with something.私はこの辺りに不案内だ。↗I'm a stranger in these parts.
- もの知らずものしらずno-adjectiveRefers to an ignorant or foolish person, or such behavior, with a critical or dismissive nuance. Use it when calling someone ignorant in the blaming sense, not for neutral lack of knowledge.
- 不知ふちnounA rare, formal word for ignorance or foolishness, mainly found in writing. Like 蒙, it is seldom the word you want; choose 無知 for ordinary contexts.
For plain lack of knowledge use 無知; 「もの知らず」 adds a critical tone about a person; 不案内 covers unfamiliarity; 蒙 and 不知 are rare, literary choices best avoided by learners.
Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only
Japanese equivalents
See also
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