What it means
もしかしたら means “perhaps” or “maybe” and presents the following information as uncertain. It usually appears at the beginning of a sentence or clause and is very often used with かもしれない or かもしれません. The speaker is suggesting a possibility rather than making a confident prediction. The expression itself is not a politeness marker, so the rest of the sentence determines the register.
Usage note
もしかしたら is often used together with かもしれない or かもしれません, but these expressions are not interchangeable: もしかしたら introduces the possibility, while かもしれない or かもしれません marks the uncertain judgment. It can also occur with other expressions such as でしょう when the context supports that combination.
How to use it
もしかしたら、明日の会議は延期になるかもしれません。
Perhaps tomorrow's meeting will be postponed.
もしかしたら、明日の会議は延期になるかもしれない。
Perhaps tomorrow's meeting will be postponed.
Example sentences
もしかしたら、明日の朝は電車が遅れるかもしれません。
Perhaps the trains may be delayed tomorrow morning.
もしかしたら、図書館は祝日で休みかもしれません。
Perhaps the library may be closed because it is a public holiday.
もしかしたら、母は午後の会議に間に合わないかもしれない。
Perhaps my mother may not make it in time for the afternoon meeting.
もしかしたら、来月の