を前提として【をぜんていとして】

The grammar structure を前提として expresses that something is done on the premise of, on the assumption of, or with the precondition of a certain condition or understanding. It is used when an action, plan, or discussion is based on a specific assumption or prerequisite.

ぜんてい前提 (ぜんてい) means "premise" or "precondition," and the full expression literally means "taking ~ as the premise." It is commonly found in formal writing, business contexts, contracts, and policy discussions.

Basic usage

Variant forms

This grammar point has several interchangeable forms:

• を前提として – the full form, slightly formal
• を前提に – a shorter, common variant
• を前提とした
  • Noun – used as a noun modifier (modifying what follows)
• を前提にした
  • Noun – same modifier usage, slightly more casual

Usage notes

The noun before をぜんてい前提として is typically an abstract concept such as a plan, agreement, outcome, or condition – not a concrete physical object. Common nouns used include けっこん結婚, ごうい合意, さいよう採用, じっし実施, さんか参加, and similar words representing outcomes or commitments.

This expression is more formal than simply saying 〜～つもりで or 〜～とかてい仮定して, and it carries a stronger sense that the stated condition is a firm basis for what follows, not merely a casual expectation.