不詳|ふしょうfushou[0]heiban (flat)
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- na-adjective, no-adjectiveunknown; unidentified; unspecified
Conjugation
| Plain form | 不詳(ふしょう) |
|---|---|
| Polite (desu) | 不詳です(ふしょうです) |
| Negative (dewa nai) | 不詳ではない(ふしょうではない) |
| polite (dewa arimasen) | 不詳ではありません(ふしょうではありません) |
| Past (datta) | 不詳だった(ふしょうだった) |
| Past negative (dewa nakatta) | 不詳ではなかった(ふしょうではなかった) |
| Te form (de) | 不詳で(ふしょうで) |
| Adverbial (ni) | 不詳に(ふしょうに) |
| Conditional (nara) | 不詳なら(ふしょうなら) |
Common forms generated by rule; see the senses for honorific or irregular usage.
- Synonym不明ふめいNeutralA broad word for anything unclear or undetermined, as in 「原因不明」; 「不詳」 is mostly for unknown identity, authorship, age and similar details.
- Related名もないなもないNeutralFor nameless or obscure things, as in 「名もない花」; it stresses having no name, while 「不詳」 stresses that the details are unknown.
- Antonym明らかあきらかNeutralThe antonym: clear, evident, plain. It stands opposite to 「不詳」 when a situation or facts are unclear.
Use 「不詳」 for unknown identity, authorship or age on records, as in 「作者不詳」「年齢不詳」. For unclear matters in general pick 「不明」; for nameless people or things use 「名もない」.
Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only


