を前提に【をぜんていに】

The expression を前提に (をぜんていに) is used to indicate that something is done on the premise of, on the assumption of, or with the precondition of a certain condition or expectation. It conveys that the action, decision, or discussion that follows is based on a particular assumption being true or a particular goal being intended.

ぜんてい前提 means "premise" or "precondition," so the literal sense is "with X as the premise." This structure is used in formal contexts such as business discussions, negotiations, policy-making, and academic writing.

Basic usage

Variations

This grammar point has several related forms:

• を前提に – used adverbially to modify a verb or clause
• を前提にして – a slightly more explicit variant with the same meaning
• を前提にした – modifies a noun (past/attributive form)
• を前提として – a more formal variant, common in written language

Important nuances

The item before をぜんてい前提に is typically a noun representing a condition, assumption, or intended outcome. It can express either a factual precondition (something assumed to be true) or a goal-oriented assumption (something intended to happen as a result). The nuance depends on context.

This expression carries a formal tone and is more common in written Japanese, news, and professional conversations than in casual everyday speech.