Translation guide
The English word "unspecified" is used to indicate that something is not stated, identified, or made specific. In Japanese, this concept is expressed through various words, phrases, and grammatical patterns depending on the context. Common approaches include using words like 不特定 (futokutei) for unspecified people or things, 未定 (mitei) for plans or details not yet decided, and 不明 (fumei) for unknown or unclear information. In many cases, Japanese omits the subject or object when it is unspecified, relying on context instead of a direct translation.
Use when referring to an unspecified person, object, location, etc., often in general statements or when the exact identity is irrelevant.
Means 'unspecified' or 'indeterminate'. Commonly used in formal contexts like '不特定多数' (unspecified large number of people).
不特定多数の人に情報を発信する。
Disseminate information to an unspecified large number of people.
Literally 'not a specific ~'. Used to say something is not specified or particular.
特定の理由はない。
There is no specific reason.
Attached to a noun to mean 'or something', implying an unspecified alternative. Casual.
事故か何かがあったみたい。
It seems there was an accident or something.
Use when a plan, date, price, etc. has not been fixed or made public.
Means 'undecided' or 'not yet fixed'. Commonly used in schedules, announcements.
日程は未定です。
The schedule is undecided.
Means 'unannounced' or 'not yet disclosed'. Used for information not released to the public.
Plain way to say 'has not been decided'. Natural in conversation.
まだ日時は決まっていない。
The date and time haven't been decided yet.
Use when something is not known or cannot be identified.
Means 'unknown' or 'unclear'. Often used in reports, news, or formal contexts.
原因は不明です。
The cause is unknown.
Means 'unknown' or 'not detailed', often used in official documents for personal information like birthplace.
Casual way to say 'don't know' or 'unclear'. Very common in speech.
誰が来るかわからない。
I don't know who's coming.
In Japanese, unspecified elements are often simply left out. This is a strategy rather than a direct translation.
Directly translating 'unspecified' as 不特定 in all contexts can sound unnatural. Choose the word that matches the specific nuance: undecided, unknown, or not identified. In many cases, simply omitting the unspecified element is more natural.
未定 (mitei) is for things not yet decided (schedule, plan). 不明 (fumei) is for things unknown or unclear (cause, identity). 不特定 (futokutei) is for things not specifically identified (people, objects).
会議の日付は未定です。
The meeting date is unspecified.
不特定多数の人が参加した。
An unspecified number of people attended.
原因は不明のままだ。
The cause remains unspecified.
詳細は未発表です。
Details are unannounced.
Birthplace unknown.