Translation guide
Describes something that has not yet been verified, proven, or officially accepted. Japanese uses different expressions depending on whether you are talking about rumors, reports, reservations, or scientific facts.
That information is still unconfirmed.
Many unconfirmed reports have been received.
Literally 'has not been confirmed'. A more verbal, explanatory phrase. Common in news and formal contexts.
The death toll has not yet been confirmed.
Means 'uncertain' or 'unreliable'. Used when the truth of something is in doubt, not just unconfirmed.
The truth of that rumor is uncertain.
To say that a plan, booking, or schedule is not yet definite or subject to change.
Means 'not yet fixed' or 'undecided'. Used for schedules, plans, or details that are still tentative.
The meeting date is still unconfirmed.
Verbal phrase meaning 'has not been finalized'. Common in business settings.
Prefix meaning 'temporary' or 'provisional'. Often used for tentative bookings or plans.
To say that a theory, claim, or hypothesis lacks evidence or has not been proven.
未確認 (mikakunin) is about verification of facts or existence, while 未確定 (mikakutei) is about decisions or schedules not being finalized. Use 未確認 for news, sightings, or information; use 未確定 for plans, dates, or details.
unidentified flying object (UFO)
tentative schedule
The reservation is not yet confirmed.
It's a provisional reservation.
That hypothesis is still unconfirmed.