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Vocabulary
～を前提に

B1 noun #4,000 most common 9 min read

～を前提に

wo genshi ni Top 4,000

Practice it Examples Notes & Tips ～を前提に in 30 Seconds

Explanation ～を前提に in your Level:

At the A1 level, you don't need to worry about the complex grammar of '～を前提に' just yet. However, you can think of it as a way to say 'This is the start.' Imagine you are playing a game. The 'premise' is the rule you agree on before you start. In Japanese, 'zentei' is like a rule or a starting fact. For beginners, just remember that 'zentei' means 'the thing that comes first' or 'the basic idea.' You might see it in simple sentences like 'Marriage is the premise' when people talk about serious dating. It is a big word, but the idea is simple: 'We agree on this first, then we do the next thing.' Think of it like building a house; the 'premise' is the ground you build on.

At the A2 level, you can start to recognize '～を前提に' in formal contexts or serious conversations. It is often used with nouns. For example, 'Kekkon wo zentei ni' (with marriage as the premise). This is a very common phrase in Japan when people are dating seriously. You can use it to show that you have a specific goal or reason for doing something. It is a step up from using 'because' (kara). While 'kara' explains a reason, 'wo zentei ni' explains the foundation of your plan. Try to notice it when watching Japanese dramas or reading simple news articles. It usually appears as: [Noun] + を (particle) + 前提 (zentei) + に (particle). It helps make your sentences sound more organized and serious.

At the B1 level, you should be able to use '～を前提に' to connect ideas in your speaking and writing. This is the level where you move beyond simple sentences and start explaining complex plans or opinions. You can use the pattern [Noun] + を前提に + [Verb] to show that your action depends on a specific assumption. For example, 'Assuming success, let's talk about the future' (Seikou wo zentei ni, mirai no hanashi wo shimashou). You also need to learn how to use it with verbs: [Verb dictionary form] + ことを前提に. This allows you to say things like 'Assuming that we will win...' (Katsu koto wo zentei ni...). This grammar is very useful for business meetings and academic essays where you need to state your assumptions clearly to avoid confusion.

At the B2 level, you should have a firm grasp of the nuances of '～を前提に' compared to its synonyms like '～に基づいて' (based on) or '～を条件に' (on the condition of). You should be able to use it naturally in professional settings to frame discussions. For instance, in a negotiation, you might say, 'We are negotiating on the premise that the deadline can be extended.' This shows a high level of linguistic control. You should also be comfortable with the adjectival form '～を前提とした' to modify nouns, such as 'zentei to shita keikaku' (a plan based on the premise). At this level, you are expected to use this structure to build logical arguments and clearly define the scope of your statements in both formal speech and written reports.

At the C1 level, '～を前提に' becomes a tool for precise logical framing and rhetorical strategy. You use it not just to state conditions, but to control the flow of a high-level debate. You can use it to challenge someone else's argument by questioning their 'zentei' (premises). For example, 'Sono giron wa, jinkou ga fueru koto wo zentei ni shiteimasu ga...' (That argument assumes the population will increase, but...). You will encounter this frequently in legal texts, philosophical treatises, and advanced scientific literature. Your usage should be flawless, including the ability to use it in complex sentence structures with multiple clauses. You should also understand its role in 'high-context' Japanese communication, where stating the premise can sometimes be a polite way to set boundaries without being direct.

At the C2 level, your mastery of '～を前提に' is absolute. You can use it to navigate the most complex social and professional landscapes in Japan. You understand the philosophical implications of '前提' and can engage in deep discussions about the underlying assumptions of societal norms, legal systems, or scientific paradigms. You can use the phrase with perfect timing and tone, whether you are drafting a multi-million dollar contract, delivering a keynote speech, or writing a doctoral thesis. You are also aware of the historical and etymological roots of the term and can use related expressions like '既定の事実' (established fact) or '自明の理' (self-evident truth) to supplement your arguments. At this level, the phrase is no longer a grammar point to remember, but a natural part of your cognitive framework for organizing and expressing complex thought in Japanese.

Practice it Examples Notes & Tips

～を前提に in 30 Seconds

Indicates a logical foundation or prerequisite for an action or plan.
Commonly used in formal, business, and legal contexts for clarity.
Requires 'koto' when following a verb to nominalize the action.
Translates to 'on the premise of' or 'assuming that' in English.

The Japanese expression ～を前提に (wo zentei ni) is a sophisticated grammatical structure used to indicate that an action, decision, or statement is being made based on a specific underlying assumption, condition, or premise. In English, it most closely translates to 'on the premise of,' 'assuming that,' or 'with the understanding that.' This phrase is indispensable in formal discussions, business negotiations, and academic writing where clarifying the starting point of a logical argument or a plan is crucial for mutual understanding. The word zentei (前提) itself consists of two kanji: 前 (mae), meaning 'before' or 'previous,' and 提 (tei), meaning 'to propose' or 'to present.' Together, they form the concept of a 'pre-proposal' or a foundation that must be accepted before moving forward with the main point of discussion.

Logical Foundation: This structure establishes the 'if' or the 'given' factors that allow the rest of the sentence to hold true. It is not merely a background detail; it is the structural support for the entire proposition.
Conditional Agreement: In business contexts, it is frequently used to set boundaries for a deal. For example, 'We will proceed on the premise that the price remains unchanged.'
Implicit Expectations: Sometimes it refers to social expectations, such as a relationship starting with the premise of eventual marriage (kekkon wo zentei ni).

結婚を前提に、彼女と付き合い始めました。

Translation: I started dating her on the premise of (eventual) marriage.

When using this phrase, the speaker is essentially saying, 'Everything I am about to say or do is only valid if we first agree on this specific point.' It provides a safety net for communication. In Japanese culture, where clarity in high-stakes situations is valued alongside politeness, ～を前提に allows for a firm stance without being overly aggressive. It frames the condition as a logical necessity rather than a personal demand. For instance, in an urban planning meeting, one might say, 'We are designing this park on the premise that the population will double,' which sets a clear logical boundary for the design choices being made.

再利用を前提に、このパッケージは設計されています。

Translation: This package is designed on the premise of reuse.

Formal Register: While not exclusively for business, it is rare in casual slang. It suggests a level of serious thought and planning.

The grammar of ～を前提に follows a consistent pattern that is relatively easy to master once you understand the role of the particle wo and the noun zentei. The most common structure is [Noun] + を前提に + [Verb/Action]. This indicates that the action described by the verb is performed with the noun serving as the prerequisite. If you want to use a verb as the premise, you must first nominalize it using koto or no, resulting in [Verb-dictionary form] + ことを前提に.

来年帰国することを前提に、家を借りました。

Translation: I rented the house on the premise that I will return to my country next year.

It is important to distinguish between ～を前提に and other conditional markers like ～たら or ～ば. While the latter describe simple cause-and-effect or hypothetical scenarios, ～を前提に implies a deliberate framing of the situation. It suggests that the premise is a 'given' fact in the mind of the speaker. For example, saying 'If it rains, we won't go' uses tara. But saying 'We are planning the event on the premise that it won't rain' uses zentei ni, which implies that the entire planning process has already incorporated this assumption into its structure.

Noun + を前提に: Direct usage with a noun representing a condition (e.g., 成功を前提に - assuming success).
Verb + ことを前提に: Using a full action as a premise (e.g., 参加することを前提に - assuming [they] will participate).

予算が足りないことを前提に、計画を立て直しましょう。

Translation: Let's redraw the plan on the premise that the budget is insufficient.

In professional writing, you will often see this phrase at the beginning of a paragraph to set the context for the subsequent analysis. It functions as a logical anchor. When you use it, you are signaling to your audience that they should interpret everything that follows through the lens of that specific premise. If the premise is removed, the entire argument or plan might collapse. This is why it is so common in scientific papers (hypotheses), legal contracts (stipulations), and strategic planning documents.

You will encounter ～を前提に in a variety of high-stakes and professional environments. It is a staple of the Japanese business world, particularly during the negotiation phase of a project. When companies discuss partnerships, they often use this phrase to define the scope of their cooperation. For example, a tech company might collaborate with a manufacturer on the premise of shared intellectual property. Hearing this word is a signal that the conversation has moved beyond small talk and into the realm of concrete conditions and logical frameworks.

このプロジェクトは、３年以内の黒字化を前提に承認されました。

Translation: This project was approved on the premise of becoming profitable within three years.

Another very common place to hear this is in news broadcasts and political commentary. Reporters often use it to explain the basis of government policies or international agreements. If a new tax law is being discussed, a news anchor might say it is being proposed on the premise of supporting the aging population. This usage helps the public understand the 'why' behind complex decisions by highlighting the underlying assumption that justifies the action.

News & Media: Explaining the rationale behind laws, treaties, or large-scale social shifts.
Legal & Contracts: Defining the conditions under which an agreement is valid and binding.
Relationships: Used in serious dating contexts to indicate long-term intentions (marriage).

In daily life, while less frequent than in the office, you might hear it when people are making serious life plans. A couple might discuss buying a house on the premise that they will both continue working. Students might choose a university course on the premise of pursuing a specific career path. In these cases, it adds a layer of gravity and intentionality to the conversation. It shows that the speaker has thought through the consequences and is operating based on a clear set of expectations.

全員が参加することを前提に、スケジュールを組みました。

Translation: I set the schedule on the premise that everyone will participate.

One of the most common mistakes learners make when using ～を前提に is confusing it with simple conditional forms like ～ば (ba) or ～たら (tara). While both involve conditions, ～を前提に implies that the condition is an established foundation for the subsequent action. For example, saying 'Ame ga futtara ikimasen' (If it rains, I won't go) is a simple reaction. However, 'Ame ga furanai koto wo zentei ni keikaku wo tatemashita' (I made the plan on the premise that it won't rain) suggests the plan was built around this assumption. Using the simple conditional when you mean 'premise' can make your Japanese sound less precise and more reactive than intentional.

Mistake: Omitting 'Koto': Learners often try to attach a verb directly to wo zentei ni. You must say koto wo zentei ni to turn the verb into a noun phrase.
Mistake: Using it for trivial things: Using this phrase for very minor, everyday actions can sound overly dramatic or stiff. For example, 'I'll eat bread on the premise that there's no rice' sounds unnaturally formal.

× 成功するを前提に話します。
○ 成功することを前提に話します。

Correction: Always nominalize verbs before 'wo zentei ni'.

Another nuance mistake is using ～を前提に when ～を条件に (wo jouken ni - on the condition that) is more appropriate. While similar, jouken is used when a specific requirement must be met by another party (like a trade or a deal). Zentei is more about the logical starting point or the assumption of a state of affairs. If you say 'I'll give you money on the premise that you work,' it sounds a bit odd; 'on the condition that you work' (jouken ni) is the standard way to express a quid pro quo.

Finally, be careful with the direction of the premise. The thing coming before wo zentei ni is the 'given' or the 'foundation.' Sometimes learners flip the logic, putting the result before the premise. Always remember: [Foundation/Assumption] + を前提に + [Resulting Action/Statement]. If you keep this logical flow in mind, you will avoid many common errors in sentence construction.

There are several Japanese expressions that share a semantic field with ～を前提に. Understanding the subtle differences between them will greatly enhance your fluency and precision. The most common alternatives are ～を条件に (wo jouken ni), ～に基づいて (ni motozuite), and ～を踏まえて (wo fumaete). Each of these highlights a different aspect of the relationship between the foundation and the action.

～を条件に (On the condition of): Focuses on a specific requirement or a 'deal.' It is more transactional than zentei. Example: 'I will go on the condition that you pay.'
～に基づいて (Based on): Used when the foundation is a set of facts, data, or laws. It is more objective. Example: 'The decision was made based on the survey results.'
～を踏まえて (Taking into account): Suggests that previous information or experiences have been considered. It is less about a 'premise' and more about 'incorporating' feedback or history.

事実に基づいて報告してください。(Report based on facts.)
事実を前提に議論しましょう。(Let's discuss assuming these are the facts.)

Comparison: 'Based on' refers to the source, 'On the premise' refers to the assumption for the sake of the argument.

When deciding which one to use, ask yourself: Is this a requirement (jouken), a factual source (motozuite), something to keep in mind (fumaete), or a logical starting point (zentei)? In a business meeting, you might use all of these in different sentences. You might say, 'Based on (motozuite) last month's data, and taking into account (fumaete) the client's feedback, we will proceed with the project on the premise (zentei ni) that we can secure more funding, on the condition (jouken ni) that the interest rate stays low.'

Using the correct synonym not only makes you sound more like a native speaker but also ensures that your logical arguments are airtight. In academic writing, zentei is particularly powerful because it allows you to clearly state the limits of your research. By stating your 'zentei,' you are effectively saying, 'Within these specific boundaries, my conclusions are valid.'

How Formal Is It?

Fun Fact

The kanji '提' (tei) is also found in 'teian' (proposal) and 'teiji' (presentation), showing its connection to presenting ideas.

Pronunciation Guide

UK /woʊ zen.teɪ ni/

US /woʊ zen.teɪ ni/

Japanese is a pitch-accent language; 'zentei' typically has a low-high-high-high (Heiban) pattern.

Rhymes With

antei (stability) gentei (limitation) kentei (certification) sentei (selection) mentei (face/honor) hantei (judgment) shitei (specification) kaitei (revision)

Common Errors

Pronouncing 'wo' as a strong English 'W'. It should be a soft 'o'.
Shortening the 'ei' in 'zentei' to a short 'e'.
Confusing 'zentei' with 'zentai' (whole).

Difficulty Rating

Reading 3/5

The kanji are standard but the abstract concept requires intermediate reading comprehension.

Writing 4/5

Requires correct use of 'koto' nominalization and understanding of logical flow.

Speaking 3/5

Common in set phrases like 'marriage premise,' making it easier to use in specific contexts.

Listening 3/5

Clearly marked by particles, but can be missed in fast-paced business speech.

What to Learn Next

Prerequisites

前 (Before) 条件 (Condition) 理由 (Reason) 計画 (Plan) こと (Thing/Nominalizer)

Learn Next

～に基づいて (Based on) ～に際して (On the occasion of) ～を通じて (Through/Via) ～をめぐって (Concerning/Around) ～に即して (In line with)

Advanced

推論 (Inference) 演繹 (Deduction) 帰納 (Induction) 蓋然性 (Probability) 自明 (Self-evident)

Grammar to Know

Nominalization with 'Koto'

食べることを前提にする (Assume eating).

Adjectival modification with 'to shita'

前提とした議論 (A discussion based on the premise).

Adverbial 'ni' vs Noun-modifying 'no'

前提に話す vs 前提の話.

Negative conditions

失敗しないことを前提に (Assuming no failure).

Compound nouns with 'Zentei'

大前提としての条件 (As a major premise condition).

Examples by Level

結婚を前提に付き合います。

I date with the premise of marriage.

Noun + wo zentei ni

合格を前提に勉強します。

I study on the premise of passing.

Noun + wo zentei ni

参加を前提に話します。

I speak on the premise of participating.

Simple noun usage.

成功を前提に計画を立てます。

I make a plan on the premise of success.

Focus on 'seikou' (success).

晴れを前提に準備します。

I prepare on the premise of sunny weather.

Weather condition as a premise.

無料を前提に登録しました。

I registered on the premise that it is free.

Cost as a premise.

許可を前提に進めます。

I will proceed on the premise of permission.

Permission as the foundation.

理解を前提に説明します。

I explain on the premise of understanding.

Mental state as a premise.

卒業することを前提に、仕事を探しています。

I am looking for a job on the premise that I will graduate.

Verb + koto wo zentei ni

雨が降らないことを前提に、イベントを計画しました。

I planned the event on the premise that it won't rain.

Negative verb + koto wo zentei ni

来月帰ることを前提に、この部屋を借りました。

I rented this room on the premise of returning next month.

Time-based premise.

全員来ることを前提に、椅子を準備してください。

Please prepare chairs on the premise that everyone is coming.

Instruction based on a premise.

安くなることを前提に、買い物を待ちます。

I will wait to shop on the premise that it will get cheaper.

Economic assumption.

一人で行くことを前提に、荷物をまとめました。

I packed on the premise of going alone.

Condition of travel.

使うことを前提に、これを買いました。

I bought this on the premise of using it.

Intention as a premise.

勝つことを前提に、お祝いの準備をしました。

I prepared a celebration on the premise of winning.

Confident assumption.

このプロジェクトは、予算内で収まることを前提に進められています。

This project is proceeding on the premise that it stays within budget.

Formal business usage.

将来的に独立することを前提に、今の会社でスキルを磨いています。

I am honing my skills at my current company on the premise of becoming independent in the future.

Career planning context.

再利用することを前提に、このパッケージはデザインされています。

This package is designed on the premise of being reused.

Product design context.

彼は、私が手伝うことを前提に仕事を引き受けたようです。

It seems he took the job on the premise that I would help.

Relational assumption.

新しいシステムを導入することを前提に、マニュアルを作成しました。

I created a manual on the premise of introducing a new system.

Systemic premise.

彼女は、留学することを前提に英語の勉強を始めました。

She started studying English on the premise of studying abroad.

Educational goal.

その契約は、秘密を守ることを前提に結ばれました。

The contract was signed on the premise of keeping secrets.

Legal/Contractual premise.

人口が減ることを前提に、都市計画を見直す必要があります。

It is necessary to review city planning on the premise that the population will decrease.

Societal premise.

政府は、景気が回復することを前提に、増税の時期を検討している。

The government is considering the timing of tax hikes on the premise that the economy will recover.

Political/Macro-economic context.

この理論は、すべての人間が合理的に行動することを前提としている。

This theory assumes (is based on the premise) that all humans act rationally.

Academic/Theoretical usage.

合意が得られることを前提に、具体的なスケジュールを調整しましょう。

Assuming that an agreement will be reached, let's adjust the specific schedule.

Negotiation strategy.

その映画は、続編が作られることを前提にしたエンディングだった。

That movie had an ending on the premise that a sequel would be made.

Narrative structure.

協力が得られないことを前提に、別のプランも用意しておくべきだ。

We should prepare another plan on the premise that cooperation cannot be obtained.

Risk management.

彼は、昇進することを前提に新しい車を買ってしまった。

He bought a new car on the premise that he would be promoted.

Personal financial risk.

この投資は、リスクが高いことを前提に検討してください。

Please consider this investment on the premise that the risk is high.

Financial advisory.

環境保護を前提に、新しい工場の建設が許可された。

The construction of a new factory was permitted on the premise of environmental protection.

Regulatory premise.

この議論は、民主主義が正しく機能していることを前提に進められているが、その前提自体を疑う必要がある。

This discussion proceeds on the premise that democracy is functioning correctly, but we need to question that premise itself.

Critical analysis of premises.

平和的な解決が可能であることを前提に、外交交渉が続けられている。

Diplomatic negotiations are being continued on the premise that a peaceful resolution is possible.

International relations.

既存の枠組みを維持することを前提にするのではなく、ゼロベースで考えるべきだ。

Instead of assuming the maintenance of the existing framework, we should think from a zero base.

Strategic management terminology.

その判決は、被告に殺意があったことを前提に下された。

The verdict was handed down on the premise that the defendant had intent to kill.

Legal/Judicial context.

科学的な客観性を前提にしながらも、主観的な経験を無視することはできない。

While assuming scientific objectivity, we cannot ignore subjective experiences.

Epistemological discussion.

市場が常に効率的であることを前提とする経済モデルには、限界がある。

There are limits to economic models that assume the market is always efficient.

Advanced economic theory.

情報の非対称性を前提に、消費者保護の法整備が進められてきた。

Legislation for consumer protection has been developed on the premise of information asymmetry.

Legal/Sociological theory.

相互信頼を前提にしない限り、このパートナーシップは成り立たない。

Unless it is based on the premise of mutual trust, this partnership will not work.

Conditional logic in partnerships.

形而上学的な存在を前提にすることなく、倫理体系を構築することは可能かという問いは、現代哲学の核心である。

The question of whether it is possible to construct an ethical system without assuming metaphysical existence is at the heart of modern philosophy.

Highly academic/Philosophical.

この条約は、各国の主権が尊重されることを大前提に、国際協調を促すものである。

This treaty promotes international cooperation on the major premise that the sovereignty of each nation is respected.

Use of 'dai-zentei' (major premise).

言論の自由を前提にしながらも、ヘイトスピーチに対する規制をどう整合させるかが課題となっている。

While assuming freedom of speech, the challenge lies in how to reconcile regulations against hate speech.

Complex socio-legal conflict.

技術革新が指数関数的に進むことを前提に、我々の社会構造は根本的な変革を迫られている。

On the premise that technological innovation proceeds exponentially, our social structure is being forced into fundamental transformation.

Futurism/Societal analysis.

その理論的枠組みは、古典物理学の法則が極微の世界でも通用することを前提としていたが、量子力学の登場により覆された。

The theoretical framework assumed that the laws of classical physics applied even in the microscopic world, but it was overturned by the advent of quantum mechanics.

History of science.

自己責任を前提とする社会システムにおいては、セーフティネットの構築が不可欠である。

In a social system based on the premise of self-responsibility, the construction of a safety net is indispensable.

Political science/Social policy.

情報の完全性を前提とした従来の取引モデルは、ブロックチェーン技術の台頭により再定義されつつある。

Traditional transaction models based on the premise of information integrity are being redefined by the rise of blockchain technology.

Fintech/Economic evolution.

人間の理性が万能であることを前提にせず、感情や認知のバイアスを考慮した政策立案が求められている。

Policy-making is required that does not assume human reason is omnipotent but considers emotional and cognitive biases.

Behavioral economics/Public policy.

Common Collocations

結婚を前提に

成功を前提に

予算を前提に

事実を前提に

許可を前提に

再利用を前提に

参加を前提に

回収を前提に

合意を前提に

継続を前提に

Common Phrases

前提に置く

— To place as a premise; to establish as a foundation.

まずは、平和を前提に置くべきだ。

前提条件

— Prerequisite; precondition.

それが交渉の前提条件です。

前提が崩れる

— The premise collapses; the assumption is proven wrong.

その前提が崩れると、計画は台無しだ。

前提を疑う

— To doubt or question the premise.

一度、その前提を疑ってみよう。

前提とする

— To assume; to take as a premise.

このモデルは完全競争を前提としている。

大前提

— Major premise; fundamental assumption.

安全は大前提です。

共通の前提

— Common ground; shared assumptions.

共通の前提に立って議論する。

暗黙の前提

— Implicit premise; unspoken assumption.

そこには暗黙の前提がある。

論理的前提

— Logical premise.

論理的前提が間違っている。

誤った前提

— False premise.

誤った前提に基づいた結論。

Often Confused With

～を前提に vs ～に基づいて

Based on facts/data, whereas 'zentei' is based on assumptions/logic.

～を前提に vs ～を条件に

A requirement/deal, whereas 'zentei' is a logical foundation.

～を前提に vs ～を仮定して

A 'what if' scenario, whereas 'zentei' is often treated as a given.

Idioms & Expressions

"一事が万事"

— From one thing, you can judge everything else. Often used when a single 'premise' reveals a whole personality.

彼の遅刻は一事が万事だ。

General

"砂上の楼閣"

— A castle built on sand. Something built on a weak premise or foundation.

その計画は砂上の楼閣に過ぎない。

Literary/Formal

"足元を見る"

— To take advantage of someone's weakness. Often occurs when the premise of a deal is unfair.

足元を見て高い値を要求する。

Common

"土台無理な話"

— Something that is fundamentally impossible from the start (premise).

それは土台無理な話だ。

Colloquial

"根も葉もない"

— Groundless; having no basis or premise in fact.

根も葉もない噂。

Common

"当たり前"

— Take for granted. The 'premise' of everyday life.

当たり前のことを前提にする。

General

"二の次"

— Secondary. When the 'premise' is so important that everything else is secondary.

利益は二の次で、まずは安全を前提にする。

Common

"話が違う"

— That's not what we agreed on. When the premise of a conversation changes.

さっきと話が違うじゃないか。

Colloquial

"筋を通す"

— To act logically or according to principle/premise.

最後まで筋を通すべきだ。

Formal

"机上の空論"

— Theoretical plan with no basis in reality. A plan with a flawed premise.

それは机上の空論だ。

Formal/Academic

Easily Confused

～を前提に vs 前提 (Zentei)

Sounds like 'Zentai' (Whole).

Zentei is 'premise'; Zentai is 'entirety'.

全体の前提 (The premise of the whole).

～を前提に vs 条件 (Jouken)

Both imply conditions.

Jouken is a 'requirement' for a deal; Zentei is a 'foundation' for a thought/plan.

条件付きの前提 (A premise with conditions).

～を前提に vs 仮定 (Katei)

Both involve assuming something.

Katei is purely hypothetical; Zentei is the basis of a current plan.

仮定の話を前提にする (To take a hypothetical story as a premise).

～を前提に vs 背景 (Haikei)

Both describe what's 'behind' something.

Haikei is the context/environment; Zentei is the logical requirement.

社会背景を前提にする (To take the social background as a premise).

～を前提に vs 基礎 (Kiso)

Both mean foundation.

Kiso is the physical or skill-based foundation; Zentei is the logical one.

基礎知識を前提にする (To assume basic knowledge).

Sentence Patterns

[Noun] を前提に、[Verb]

成功を前提に、準備を進める。

[Verb-Dictionary] ことを前提に、[Verb]

合格することを前提に、旅行を予約する。

[Noun] を前提とした [Noun]

再利用を前提としたデザイン。

[Clause] という前提で、[Verb]

彼が来るという前提で、席を用意する。

[Noun] を大前提に、[Verb]

安全を大前提に、工事を行う。

[Noun] を前提に置く

論理的な一貫性を前提に置く。

[Noun] を前提としない [Noun]

特定の宗教を前提としない道徳教育。

[Noun] が前提になっている

その議論は、不平等が前提になっている。

Word Family

Nouns

前提 (zentei) - Premise

大前提 (daizentei) - Major premise

前提条件 (zentei jouken) - Precondition

Verbs

前提とする (zentei to suru) - To take as a premise

前提に置く (zentei ni oku) - To place as a premise

Adjectives

前提とした (zentei to shita) - Based on the premise (modifies nouns)

仮定 (katei) - Hypothesis

基礎 (kiso) - Foundation

根拠 (konkyo) - Basis

条件 (jouken) - Condition

背景 (haikei) - Background

How to Use It

frequency

High in business, legal, academic, and serious social contexts.

Common Mistakes

Using 'wo zentei ni' for small things. → Use 'kara' or 'node' for everyday reasons.
Saying 'I'll go to the store on the premise of buying milk' is too heavy.
Forgetting 'koto' after a verb. → Taberu koto wo zentei ni.
Verbs must be nominalized to be used with the 'wo' particle.
Confusing 'Zentei' with 'Zentai'. → Zentei (Premise).
Zentai means 'whole' or 'entire.' They sound similar but are very different.
Using 'ni' when 'no' is needed. → Zentei no hanashi (Premise talk).
Use 'ni' for verbs, 'no' or 'to shita' for nouns.
Flipping the logic. → [Premise] wo zentei ni [Action].
The assumption always comes before the phrase 'wo zentei ni'.

Tips

Nominalization is key

Never forget to add 'koto' after a verb. 'Katsu wo zentei ni' is wrong; 'Katsu koto wo zentei ni' is right.

Business Clarity

Use this in meetings to clarify your stance. It prevents people from saying 'I didn't know that was the plan!'

Relationship Talk

If you want to tell someone you are serious about them, 'Kekkon wo zentei ni...' is the gold standard phrase.

Check your logic

If your 'zentei' is weak, your whole argument will fall. Always choose your premise carefully.

Learn 'Daizentei'

Adding 'Dai' (big) makes it 'the most important premise.' It's a great way to emphasize your main point.

Listen for 'wo'

The particle 'wo' is a great marker that a premise is coming up. It helps you segment the sentence.

Essay Structure

In the introduction of an essay, state your 'zentei' to define the scope of your writing.

Premise vs. Condition

Remember: 'Zentei' is for logic/plans; 'Jouken' is for trades/deals.

Long Vowels

Make sure to pronounce 'tei' clearly. It's 'te-i', not just a short 'te'.

Sound Professional

Switching from '...kara' to '...wo zentei ni' instantly makes your Japanese sound more mature.

Memorize It

Mnemonic

Think of 'ZEN' (like meditation/focus) and 'TEI' (like a table/surface). You need to 'focus' on the 'table' (foundation) before you put anything on it. ZEN-TEI is the table you build your ideas on.

Visual Association

Imagine a construction worker laying the 'foundation' stones before building a wall. Those foundation stones are labeled '前提'.

Word Web

Foundation Assumption Rule Start Logic Condition Business Marriage

Challenge

Try to write three sentences about your career or studies using '～を前提に'. For example: 'Assuming I pass the JLPT N2, I will...'

Word Origin

The term comes from the Chinese characters '前' (before) and '提' (propose/present). It entered Japanese as a philosophical and logical term to translate Western concepts of 'premise' during the Meiji Restoration.

Original meaning: To present or propose something in advance.

Sino-Japanese (Kango)

Cultural Context

Be careful using this in very casual settings; it can make you sound like you are drafting a contract rather than having a conversation.

In English, we might say 'on the understanding that' or 'assuming,' but 'on the premise of' is often reserved for more formal writing.

Commonly heard in 'Konkatsu' (marriage hunting) reality shows. Used in Japanese legal dramas like 'Hero' or '99.9 Criminal Lawyer'. Frequent in business management books by Peter Drucker (translated into Japanese).

Practice in Real Life

Real-World Contexts

Business Negotiations

合意を前提に (Assuming agreement)
予算内を前提に (Assuming within budget)
秘密保持を前提に (Assuming confidentiality)
継続を前提に (Assuming continuation)

Romantic Relationships

結婚を前提に (On the premise of marriage)
将来を前提に (With the future in mind)
真剣な交際を前提に (Assuming a serious relationship)
同棲を前提に (Assuming living together)

Academic Writing

仮説を前提に (Assuming the hypothesis)
既存の理論を前提に (Assuming existing theory)
客観性を前提に (Assuming objectivity)
定義を前提に (Assuming the definition)

Project Planning

成功を前提に (Assuming success)
期限を前提に (Assuming the deadline)
リソースを前提に (Assuming resources)
フィードバックを前提に (Assuming feedback)

Legal/Contracts

遵守を前提に (Assuming compliance)
有効性を前提に (Assuming validity)
事実を前提に (Assuming facts)
合意事項を前提に (Assuming agreed items)

Conversation Starters

"結婚を前提に付き合うことについて、どう思いますか？ (What do you think about dating on the premise of marriage?)"

"このプロジェクトは、何を前提に進めるべきでしょうか？ (What should we assume as the premise for this project?)"

"成功を前提にした場合、次の課題は何ですか？ (Assuming success, what is the next challenge?)"

"あなたのキャリア計画は、どのような前提に基づいていますか？ (What premises is your career plan based on?)"

"もし前提が崩れたら、どう対処しますか？ (What would you do if the premise collapsed?)"

Journal Prompts

将来、日本で働くことを前提に、今の自分に必要なスキルを書いてください。 (Write about the skills you need now, on the premise of working in Japan in the future.)

「幸せ」を前提にした人生設計について、あなたの考えを述べてください。 (Describe your thoughts on a life plan based on the premise of 'happiness'.)

最近の決断で、何を前提にしていたか振り返ってみましょう。 (Reflect on a recent decision and what premise you were assuming.)

もし「お金が無限にある」ことを前提にしたら、何をしたいですか？ (If you assumed 'infinite money,' what would you want to do?)

今の社会が「平和である」という前提について、どう感じますか？ (How do you feel about the premise that current society is 'peaceful'?)

Frequently Asked Questions

10 questions

Yes, but it's usually reserved for serious topics like marriage or long-term plans. Using it for 'I'll eat pizza on the premise that I'm hungry' sounds weirdly formal and robotic.

They are very similar. '～を前提に' is more common as an adverbial phrase (how you do something), while '～を前提として' often introduces a state or a definition.

Yes. 'Zentei' is a noun, so any verb before it must be turned into a noun phrase using 'koto'. For example, 'Iku koto wo zentei ni' (Assuming I go).

Not necessarily. You can have a 'bad premise' (ayamatta zentei). It just refers to the starting point, whether that starting point is good or bad.

You use '大前提' (daizentei). It is used for the most important, fundamental assumption of all.

Yes, '～が前提です' means '...is the premise.' Example: 'Kekkon ga zentei desu' (Marriage is the premise).

There isn't a single word, but 'ketsuron' (conclusion) is the logical endpoint, whereas 'zentei' is the starting point.

Very much so! Scientific papers often start by stating their 'zentei' (assumptions) before presenting their results.

It's about a 7/10 on the formality scale. It's standard in business but rare in very casual chat between close friends unless the topic is serious.

Yes, '～を前提にして' is a common variation that functions like 'making ... the premise.'