connective N1 common written

〜を前提に — on the premise of ~

〜を前提に・をぜんていに

Meaning

on the premise of ~ / on the assumption that ~ / presupposing ~ — sets something as a taken-for-granted condition that the following action is built upon

結婚けっこんを前提ぜんていに付つき合あっている。

We're dating on the premise of marriage.

Attaches to	Form	Example
Noun, or a nominalized clause (こと)	Nを前提ぜんていに(して) / 〜ことを前提ぜんていに	返済へんさいを前提ぜんていに / 参加さんかすることを前提ぜんていに

When: Formal/written — business, planning, contracts. The premise is treated as already agreed or assumed, not up for debate.

全員ぜんいんが出席しゅっせきすることを前提ぜんていに計画けいかくを立たてた。

We made the plan on the assumption that everyone would attend.

この制度せいどは性善説せいぜんせつを前提ぜんていにしている。

This system is premised on the belief that people are fundamentally good.

を前提ぜんていとする / を前提ぜんていとして are formal verbal variants; 前提ぜんてい alone is the noun 'premise / precondition'.

Jengo shows 〜を前提に the way you actually meet it: inside real Japanese sentences, so it sticks instead of staying an abstract rule.

Sources Compiled from published Japanese grammar references.