# を前提として: with the intention to; on the condition / assumption ~ > Learn how to use を前提として, a JLPT N1 Japanese grammar point meaning with the intention to; on the condition / assumption, with structure, nuance, examples, mistakes, and comparisons. JLPT level: N1 · Updated: 2026-05-18 · Canonical: https://hane-app.com/blog/n1-o-zentei-toshite/ **を前提(ぜんてい)として** means **with the intention to; on the condition / assumption ~**. It is a **JLPT N1** Japanese grammar pattern used to signal that an action, plan, or decision is made based on a stated premise — a prior agreement, a forecast, or an expected outcome. This grammar point often appears in formal writing, business proposals, official announcements, and N1 reading passages. If you want to make it explicitly clear that something is being done only because a particular condition is expected to hold, **を前提(ぜんてい)として** is the precise tool. ## What does を前提(ぜんてい)として mean? Use **を前提(ぜんてい)として** when you need to lay out the foundation on which a subsequent action rests. It tells the listener or reader, “We are proceeding under the shared understanding that X is true” — and if that premise turns out to be false, the action may be reconsidered or invalidated. Natural translations include: - with the intention to; on the condition / assumption ~; under the premise that; given that The best translation depends on how heavily the premise governs the sentence. In legal or formal contexts, “on the condition that” or “under the premise that” fits; in lighter planning contexts, “with the intention to” or “assuming that” works better. ## How to form を前提(ぜんてい)として Attach **を前提(ぜんてい)として** (or the slightly compressed **を前提(ぜんてい)に**) to a noun that expresses the assumption, condition, or intended outcome.
Noun ＋ を前提(ぜんてい)として → on the premise of Noun
To attach a verb phrase, nominalize it with **こと** first.
Verb (plain form) + こと ＋ を前提(ぜんてい)として → on the assumption that Verb
Examples of the pattern: - 成功(せいこう)を前提(ぜんてい)として - 支援(しえん)を得る(える)ことを前提(ぜんてい)として - 相手(あいて)が同意(どうい)することを前提(ぜんてい)に The form before the grammar point matters. In JLPT questions, the wrong answer choices often use a similar meaning but attach it to the wrong type of word, or miss the nominalizer altogether. ## When is を前提(ぜんてい)として used? Use **を前提(ぜんてい)として** in situations like: - formal proposals, contracts, or project plans that depend on a condition - negotiations where an offer hinges on the other party’s agreement - expressing that a decision was made “assuming X will happen” - academic or business writing that lays out a hypothesis as a starting point Tone and register: - formal to highly formal; natural in boardrooms, reports, and official documents - appears often in news articles about policy and in N1 reading comprehension When you use it casually among friends, you will sound overly stiff. In its proper domain, however, it conveys clarity and intentionality — you aren't just hoping for something; you are explicitly tying one action to a stated premise. ## を前提(ぜんてい)として example sentences
成功せいこうを前提ぜんていとして、多額たがくの投資とうしを行おこなった。
They invested a large sum on the assumption of success.
business
相手あいてが協力きょうりょくすることを前提ぜんていとして、計画けいかくを練ねった。
They formulated the plan on the condition that the other party would cooperate.
negotiation
この提案ていあんは予算よさんが承認しょうにんされることを前提ぜんていとしている。
This proposal is predicated on the budget being approved.
formal proposal
人口じんこうが増加ぞうかすることを前提ぜんていに、新あたらしい住宅地じゅうたくちを開発かいはつする。
They are developing a new residential area on the assumption that the population will grow.
urban planning
早期そうきの妥結だけつを前提ぜんていに交渉こうしょうが進すすめられている。
Negotiations are proceeding on the premise of an early settlement.
diplomacy
全員ぜんいんが参加さんかすることを前提ぜんていとして日程にっていを決きめた。
We set the schedule assuming that everyone would participate.
planning
After reading each sentence, ask what job **を前提(ぜんてい)として** is doing: it’s anchoring the main action to a clear, often explicit, condition. Once you see that link, the meaning sticks much better than a translation like “assuming.” ## Nuance of を前提(ぜんてい)として The key nuance is **a deliberate, often formal declaration of the premise on which everything else depends**. It isn’t a casual “if” or a hopeful “maybe”; it means the speaker has consciously set a prerequisite, and the subsequent statement is valid only as long as that prerequisite holds. This matters because Japanese has many ways to express conditions (ば, たら, なら, 限り(かぎり), etc.), but **を前提(ぜんてい)として** uniquely shines when you want to: - formalize the relationship between a condition and a plan - signal that the premise has been discussed and agreed upon - add a tone of negotiation or contractuality Compared with a simple **とすれば** (if it’s the case that), **を前提(ぜんてい)として** carries much more weight — it implies that both speaker and listener have acknowledged the premise, not merely entertained it as a hypothetical. ## を前提(ぜんてい)として vs を踏まえ(ふまえ)て Both **を前提(ぜんてい)として** and **を踏まえ(ふまえ)て** refer to something you base a decision on, but the nature of that basis differs sharply.
を前提(ぜんてい)として
on the premise / assumption of
Used when the outcome must satisfy a specific condition; the premise is a requirement, not just background information.
成功せいこうを前提ぜんていとして計画けいかくを進すすめる。
We move forward only on the assumption of success.
を踏まえ(ふまえ)て
based on / in light of
Used when an existing fact, data, or experience is taken into account as a reference point, not as a binding condition.
前回ぜんかいの結果けっかを踏ふまえて、方針ほうしんを変更へんこうした。
We changed our approach based on the previous results.
Quick contrast:
成功(せいこう)を前提(ぜんてい)として計画(けいかく)を進める(すすめる)。 成功(せいこう)を踏まえ(ふまえ)て計画(けいかく)を進める(すすめる)。
The first says “We are going ahead precisely because we expect success — if that expectation is false, the plan collapses.” The second says “We saw what worked before and are now planning accordingly.” Choose **を前提(ぜんてい)として** when the condition is a gate; choose **を踏まえ(ふまえ)て** when it’s a guide. ## Common mistakes with を前提(ぜんてい)として
❌ 成功せいこうを前提ぜんていとする、計画けいかくを進すすめた。
✅ 成功せいこうを前提ぜんていとして、計画けいかくを進すすめた。
Treat を前提(ぜんてい)として as an adverbial phrase, not a relative clause. Use the continuative として, not the dictionary form とする, when it modifies a following verb.
❌ 彼かれが来くるを前提ぜんていとして…
✅ 彼かれが来くることを前提ぜんていとして…
Never attach を directly to a plain verb. Always nominalize the verb phrase with こと or の.
❌ 明日あしたは晴はれるだろうを前提ぜんていにピクニックを計画けいかくした。
✅ 明日あしたが晴はれることを前提ぜんていにピクニックを計画けいかくした。
The grammar requires careful nominalization, and the casual conjectural だろう doesn’t fit the formal tone; restate the condition plainly.
A helpful practice method is to write one sentence with **を前提(ぜんてい)として** and then rewrite it with a simpler conditional like **〜ば**. If removing を前提(ぜんてい)として makes the sentence sound like a flimsier commitment, you’ve got the nuance. ## Is を前提(ぜんてい)として on the JLPT?
N1

Frequency: moderate

Appears in reading passages and grammar sections where a formal premise needs to be identified.

What you’ll see on the test:

For test preparation, study the grammar point in full formal sentences. JLPT N1 questions rarely reward a one‑word translation; they test your ability to grasp the weight of a condition in the overall logic of the text. ## Practice questions for を前提(ぜんてい)として
1
Write a sentence where a business plan depends on a government subsidy. Use を前提(ぜんてい)として and explain why the plan collapses without it.
formal premise
2
Negotiate a schedule: “We’ll meet on Friday, on the assumption that the director is available.” Nominalize the director’s availability correctly.
nominalize
3
Compare two sentences — one with を前提(ぜんてい)として and one with を踏まえ(ふまえ)て — about a team project. In your own words, why would a team choose one over the other?
compare
4
Take a sentence that uses ～ば and rewrite it with を前提(ぜんてい)として, adding appropriate formal context. How does the tone shift?
tone shift
Keep your first sentences simple. Once the structure feels natural, add more context — a contract, a policy proposal, a scientific hypothesis — so the nuance of a binding premise becomes unmistakable. ## Learning path for を前提(ぜんてい)として To learn **を前提(ぜんてい)として** efficiently, start with its formation, then contrast it with similar patterns, and finally practise in realistic formal scenarios.
1
Master the form: noun + を前提(ぜんてい)として and verb nominalized with こと + を前提(ぜんてい)として. Say the pattern aloud until it feels automatic.
2
Read a news article about a policy or business decision that uses 前提(ぜんてい). Highlight every instance and identify the exact premise being stated.
3
Write five original sentences in a formal style — a grant application, a project memo, a diplomatic statement — each using を前提(ぜんてい)として.
4
Compare it with [を踏まえ(ふまえ)て](/blog/n1-o-fumaete/) by taking one premise and writing two versions of the same plan: one conditional, one reflective.
5
Test yourself: find a N1 practice reading passage that contains a conditional chain; rewrite it using を前提(ぜんてい)として and check if the logic still holds.
## Related grammar to review next - [を踏まえ(ふまえ)て](/blog/n1-o-fumaete/) — the “based on” pattern; learn the difference between a premise and a reference - [を経(へ)て](/blog/n1-o-hete/) — “passing through”; a path‑based grammar that also appears in formal statements - [を控え(ひかえ)て](/blog/n1-o-hikaete/) — “just before”; often used when something is imminent, anchoring a plan to an upcoming event - [をいいことに](/blog/n1-o-ii-koto-ni/) — “taking advantage of”; another N1 pattern where a condition enables an action, but with a critical nuance These patterns sit close to **を前提(ぜんてい)として** in the N1 landscape. Each shifts the relationship between a condition and an action in a slightly different way — recognising those differences will sharpen your formal Japanese. ## Learn を前提(ぜんてい)として with Hane If you want to review **を前提(ぜんてい)として** together with the related N1 patterns above, Hane helps you practise Japanese in short, focused sessions. You’ll see the grammar in context, build automaticity, and internalise the fine‑grained distinctions between formal conditionals. Browse more lessons here: - [All grammar lessons](/blog/) - [JLPT N1 grammar lessons](/blog/n1/)