依頼 vs 要求 vs 要請 vs 請求: Japanese Request, Demand, Formal Request, Billing Claim, Invoice, and Business Email Nuance Explained

You want to politely ask a colleague to help you with a report. Your company receives a strongly worded letter demanding immediate action. A government agency sends out an urgent call for cooperation. Your supplier sends you a document asking for payment. All four situations involve “requesting” something — but in Japanese, each one uses a completely different word.

English speakers tend to reach for a single word — “request” — and then wonder why it sounds odd in Japanese. The reason is that Japanese draws sharp lines between 依頼（いらい）, 要求（ようきゅう）, 要請（ようせい）, and 請求（せいきゅう）. These four words sit at very different points on a spectrum of tone, authority, and purpose. Using the wrong one can come across as rude, overly aggressive, or just plain confusing.

This guide covers all four words in depth — with example sentences, business email phrases, pairwise comparisons, a decision flowchart, and a quick quiz. By the end, you will know exactly which word to use in every situation.

Quick Answer: 依頼 vs 要求 vs 要請 vs 請求

Here is a one-line summary for each word before we go deeper into examples and nuance.

依頼（いらい）means politely requesting work or help

依頼 is the standard Japanese word for asking someone to do something for you in a polite, cooperative way. Think of it as “commissioning” or “requesting assistance.” It carries no pressure or aggression — in fact, using 依頼 signals that you respect the other person’s time and willingness. You will hear it constantly in business Japanese, in professional emails, and between clients and service providers.

Example: 翻訳の仕事を依頼した。
（ほんやく の しごと を いらい した。）
I commissioned / requested a translation job.

要求（ようきゅう）means demanding something forcefully

要求 implies pressure. The person making the 要求 often believes they have a right to what they are asking for, and they are pressing the other party to deliver. It is not necessarily rude — sometimes it is simply direct and assertive — but it carries a noticeably stronger tone than 依頼. In written complaints, labor negotiations, and consumer rights disputes, 要求 is the natural word.

Example: 会社に改善を要求した。
（かいしゃ に かいぜん を ようきゅう した。）
I demanded improvements from the company.

要請（ようせい）means a formal or official request

要請 comes from an institution, authority, or organization — not from an individual acting in a personal capacity. Governments, companies, and official bodies use 要請 when they need something urgently or formally. The nuance is closer to “calling on” or “formally requesting” than to a simple ask. It is semi-compulsory in tone: while technically voluntary, refusing a 要請 from a government body carries social and political weight.

Example: 政府は企業に協力を要請した。
（せいふ は きぎょう に きょうりょく を ようせい した。）
The government formally requested cooperation from companies.

請求（せいきゅう）means billing or claiming payment/compensation

請求 is not a general “request” word. It specifically means asking for money, payment, or legal compensation that you are entitled to under a contract, rule, or law. The most common example is 請求書（せいきゅうしょ）— an invoice or bill. In legal contexts, 損害賠償を請求する（そんがいばいしょう を せいきゅう する）means “to claim damages.” Using 請求 for a simple work request would be strange and confusing to native speakers.

Example: 先月の代金を請求した。
（せんげつ の だいきん を せいきゅう した。）
I billed / claimed payment for last month’s fees.

Why English speakers mix these up

The core problem is that English “request” covers a wide range of tones and situations. Whether you are asking a favour, issuing a formal directive, or sending an invoice, English often uses some form of “request” or “ask.” Japanese does not allow that flexibility. Each of these four Japanese words has a specific tone and domain: 依頼 for cooperative work tasks, 要求 for assertive demands, 要請 for institutional authority, and 請求 strictly for money or legal claims. Treating them as interchangeable is one of the most common mistakes at the intermediate level.

What Does 依頼（いらい）Mean?

依頼 as a polite request

依頼（いらい） combines 依 (rely on, depend) and 頼 (ask, request, trust). Together they convey the idea of putting your trust in someone and asking them to take care of something. This is the most common and safest “request” word for most everyday business situations in Japanese.

依頼 is the word you use when you need to ask someone — a colleague, a freelancer, a contractor, a business partner — to do a task for you. It does not imply pressure or urgency. It implies respect and cooperation.

仕事を依頼する / 資料作成を依頼する / 依頼メール

Common 依頼 patterns:

• 仕事を依頼する（しごと を いらい する）— to commission / request work
• 資料作成を依頼する（しりょうさくせい を いらい する）— to ask someone to create materials
• 依頼メール（いらい メール）— a request email
• 依頼書（いらいしょ）— a written request document
• 依頼を受ける（いらい を うける）— to accept a request / take on a commission
• 依頼を断る（いらい を ことわる）— to decline a request
• ご依頼（ご いらい）— honorific form, used in business writing

ご依頼 — the honorific form in business

In formal business writing, 依頼 is often elevated to ご依頼（ごいらい） using the honorific prefix ご. This is standard in client-facing emails and professional correspondence. When a company refers to a client’s request, they say ご依頼 to show respect for the client’s instructions.

Example (business email opening): この度はご依頼いただきありがとうございます。
（このたび は ご いらい いただき ありがとう ございます。）
Thank you very much for your request / commission this time.

Common example sentences

① 翻訳会社にパンフレットの制作を依頼した。
（ほんやくがいしゃ に パンフレット の せいさく を いらい した。）
I commissioned a translation company to produce the pamphlet.

② 先輩にプレゼン資料の確認を依頼した。
（せんぱい に プレゼン しりょう の かくにん を いらい した。）
I asked my senior colleague to check the presentation materials.

③ お客様からご依頼いただいた案件を進めています。
（おきゃくさま から ご いらい いただいた あんけん を すすめて います。）
We are working on the project commissioned by the client.

④ 依頼メールを送ったが、まだ返事がない。
（いらい メール を おくった が、まだ へんじ が ない。）
I sent a request email, but I have not received a reply yet.

Yuka

So 依頼 is the safe, polite choice when I want to ask a freelancer or business partner to do something for me?

Rei

Exactly. 依頼 is your go-to for professional work requests. It is polite, clear, and natural in business Japanese. You can also use お願いする for a softer, more casual version — but in written professional contexts, 依頼 sounds more appropriate.

What Does 要求（ようきゅう）Mean?

要求 as a demand

要求（ようきゅう） combines 要 (need, require) and 求 (seek, demand). The result is a word that goes beyond a polite ask — it is a claim, a push, an assertion that something needs to happen. 要求 appears when someone feels entitled to something and is pressing the other party to deliver.

This does not mean 要求 is always aggressive. In labor relations, consumer rights, and formal negotiations, 要求 is the normal vocabulary. It signals seriousness and intent. In technical contexts — software engineering, for example — 要求 also means “requirement” (システム要求 = system requirements), which is a completely neutral, professional usage.

改善を要求する / 返金を要求する

Common 要求 patterns:

• 改善を要求する（かいぜん を ようきゅう する）— to demand improvements
• 返金を要求する（へんきん を ようきゅう する）— to demand a refund
• 要求が強い（ようきゅう が つよい）— the demand is strong / the requirements are strict
• 要求書（ようきゅうしょ）— a written demand / demand letter
• 要求を満たす（ようきゅう を みたす）— to meet / satisfy a demand or requirement
• システム要求（システム ようきゅう）— system requirements (technical use)

要求 vs 要望 — demand vs wish/desire

A common point of confusion is the difference between 要求 and 要望（ようぼう）. Both involve wanting something from another party, but the tone is very different.

要求 = demand — there is pressure, a sense of entitlement, or a rights-based claim. Refusing a 要求 has consequences.
要望 = wish or desired improvement — softer, often expressed as a suggestion or hope. A 要望 is something you would like to see happen; ignoring it is not as serious as ignoring a 要求.

Example comparison:
要望: お客様のご要望にお応えします。（おきゃくさま の ご ようぼう に おこたえ します。）
We respond to our customers’ wishes. (service-oriented, accommodating tone)

要求: 組合は会社に賃上げを要求した。（くみあい は かいしゃ に ちんあげ を ようきゅう した。）
The union demanded a wage increase from the company. (assertive, rights-based)

Common example sentences

① 消費者は企業に情報の開示を要求した。
（しょうひしゃ は きぎょう に じょうほう の かいじ を ようきゅう した。）
Consumers demanded that the company disclose information.

② 返品を断られたので、返金を要求した。
（へんぴん を ことわられた ので、へんきん を ようきゅう した。）
My return was refused, so I demanded a refund.

③ このシステムの技術要求をまとめてください。
（この システム の ぎじゅつ ようきゅう を まとめて ください。）
Please compile the technical requirements for this system.

④ 要求書を送ったにもかかわらず、返答がなかった。
（ようきゅうしょ を おくった にも かかわらず、へんとう が なかった。）
Despite sending a written demand, there was no response.

What Does 要請（ようせい）Mean?

要請 as a formal or official request

要請（ようせい） also uses the character 要 (need, require), combined with 請 (petition, request). The combination signals a formal petition — not a personal ask, but a structured, official call for action from an institution or authority.

The key feature of 要請 is its institutional source. You will almost never see an individual person 要請-ing another individual. 要請 flows from governments to companies, from organizations to members, from emergency agencies to the public. It carries the weight of authority behind it.

協力を要請する / 政府の要請 / 緊急要請

Common 要請 patterns:

• 協力を要請する（きょうりょく を ようせい する）— to formally request cooperation
• 出動を要請する（しゅつどう を ようせい する）— to request dispatch / call out (emergency services)
• 政府の要請（せいふ の ようせい）— a government request / government directive
• 緊急要請（きんきゅう ようせい）— urgent official request
• 要請を受ける（ようせい を うける）— to receive an official request
• 要請に応じる（ようせい に おうじる）— to comply with an official request

When 要請 is used (authority, emergency, institutional context)

要請 appears frequently in news Japanese, official announcements, and formal documents. During the COVID-19 pandemic in Japan, phrases like 営業自粛を要請する（えいぎょうじしゅく を ようせい する）— “to formally request a voluntary suspension of business operations” — were used constantly by governments and health authorities. The requests were technically voluntary, but the use of 要請 signaled serious official weight.

If you encounter 要請 in a news article or official document, it almost always signals that an institution is calling on people or organizations to do something important — and that non-compliance carries social or political consequences, even if not strictly legal ones.

Common example sentences

① 警察は目撃者に情報提供を要請した。
（けいさつ は もくげきしゃ に じょうほう ていきょう を ようせい した。）
The police formally requested witnesses to provide information.

② 政府は医療機関に受け入れ態勢の強化を要請した。
（せいふ は いりょうきかん に うけいれたいせい の きょうか を ようせい した。）
The government formally requested medical institutions to strengthen their capacity to accept patients.

③ 国際機関からの支援要請が届いた。
（こくさいきかん から の しえん ようせい が とどいた。）
A formal request for support arrived from an international organization.

④ 市長は住民に避難を要請した。
（しちょう は じゅうみん に ひなん を ようせい した。）
The mayor formally requested residents to evacuate.

Yuka

So 要請 is almost always used by governments or official bodies — not by regular people asking colleagues for help?

Rei

That is right. If you use 要請 in a casual workplace conversation — like asking your colleague to send you a file — it would sound very strange, almost like you are a government official issuing an order. Save 要請 for institutional or formal authority contexts.

What Does 請求（せいきゅう）Mean?

請求 as billing or a legal claim

請求（せいきゅう） combines 請 (petition, request) and 求 (seek, demand). The combination produces a very specific meaning: asking for something that you are contractually, legally, or financially entitled to receive. It is almost always about money or a legal right — not about tasks or favors.

The most common use is 請求書（せいきゅうしょ）— an invoice or bill. When a freelancer sends a client a 請求書, they are formally claiming the payment they are owed for completed work. In legal contexts, 請求 is the standard term for filing a claim — for damages, for services, for rights under a contract.

代金を請求する / 請求書を送る / 損害賠償を請求する

Common 請求 patterns:

• 代金を請求する（だいきん を せいきゅう する）— to bill / claim payment for a service
• 請求書を送る（せいきゅうしょ を おくる）— to send an invoice
• 損害賠償を請求する（そんがいばいしょう を せいきゅう する）— to claim damages (legal)
• 請求金額（せいきゅう きんがく）— the billed / invoiced amount
• 請求書の支払い（せいきゅうしょ の しはらい）— payment of an invoice
• 過払い金の請求（かばらいきん の せいきゅう）— claim for overpaid money

請求 is NOT a general “request”

This is the most important warning for English speakers: 請求 cannot be used as a general synonym for “request.” If you say 上司に仕事を請求した, it does not mean “I requested work from my boss” — it sounds like “I billed my boss for work” or “I filed a claim against my boss,” which is very different and would confuse any native speaker.

Whenever you want to say “I requested something from someone” in a general, polite sense, use 依頼した or お願いした. Reserve 請求 strictly for invoices, billing, and legal claims.

Common example sentences

① 先月のコンサルティング代を請求する請求書を送った。
（せんげつ の コンサルティングだい を せいきゅう する せいきゅうしょ を おくった。）
I sent an invoice billing for last month’s consulting fee.

② 弁護士を通じて損害賠償を請求する予定だ。
（べんごし を つうじて そんがいばいしょう を せいきゅう する よてい だ。）
We plan to claim damages through a lawyer.

③ 請求書の金額に誤りがあります。ご確認ください。
（せいきゅうしょ の きんがく に あやまり が あります。ご かくにん ください。）
There is an error in the invoiced amount. Please check.

④ 保険会社に医療費の請求をした。
（ほけんがいしゃ に いりょうひ の せいきゅう を した。）
I filed a claim with the insurance company for medical expenses.

Pairwise Comparisons

依頼 vs 要求 — polite request vs forceful demand

This is the most important contrast for everyday business use. Both words involve asking someone to do something, but the tone is completely different.

Key rule: In most business email situations, 依頼 is what you want. 要求 is reserved for situations where you are genuinely asserting a right or filing a complaint. Using 要求 where 依頼 is expected will make you sound confrontational.

依頼 vs 要請 — personal work request vs official request

Both 依頼 and 要請 are polite in tone, but they differ in who is doing the asking and why.

要求 vs 請求 — demand vs money/legal claim

Both 要求 and 請求 have a forceful, rights-asserting feeling — but they operate in different domains.

要求 is the broader “demand” word. You can 要求 anything: explanations, changes, action. The demand may or may not involve money.
請求 is specifically about money or a legal entitlement. If it involves payment, an invoice, or a compensation claim, 請求 is the correct word.

Example contrast:
要求: 会社に説明を要求した。（I demanded an explanation from the company.）
請求: 会社に損害賠償を請求した。（I filed a damages claim against the company.）

要請 vs 要求 — institutional request vs personal demand

These two look similar on the surface — both use the 要 character and both carry weight — but they differ in source and nature.

要請 comes from an authority figure or institution. It is top-down and official.
要求 can come from anyone, including individuals or groups asserting their rights. It is often bottom-up — employees demanding better conditions from management, consumers demanding refunds from companies.

Comparison:
要請: 政府が企業に節電を要請した。（The government formally requested companies to reduce electricity use.）
要求: 従業員が会社に残業代の支払いを要求した。（Employees demanded the company pay overtime wages.）

Related Request Words

お願い（おねがい）— casual everyday request

お願い（おねがい） is the most casual and warm way to ask for something in Japanese. It comes from 願う（ねがう）— to wish, to hope, to ask. お願いします is one of the first phrases Japanese learners encounter, and for good reason: it works in almost any polite situation to mean “please,” “I request,” or “I ask you.”

In casual speech, お願い is softer and friendlier than 依頼. In business, お願いします is a standard closing phrase in emails and phone calls. However, for formal professional requests — especially in writing to clients — 依頼 or ご依頼 sounds more businesslike and appropriate.

Example: 明日の資料、送ってもらえる？お願い！
（あした の しりょう、おくって もらえる？おねがい！）
Can you send me tomorrow’s materials? Please!

要望（ようぼう）— wish / desired improvement

要望（ようぼう） is softer than 要求. It means a wish, a desire, or a requested improvement — something you would like to see but are not insisting on. Companies use it in customer feedback forms: ご要望があればお聞かせください（please share any wishes/suggestions you have）. It has a collaborative, accommodating nuance that 要求 completely lacks.

Example: ユーザーからの要望を次のアップデートに反映します。
（ユーザー から の ようぼう を つぎ の アップデート に はんえい します。）
We will incorporate users’ wishes/requests into the next update.

申請（しんせい）— formal application

申請（しんせい） means to formally apply for something from an authority — a permit, a license, a visa, a subsidy. Unlike 依頼 (which asks a peer or service provider), 申請 is directed upward: to a government agency, a regulatory body, or an institution with the power to grant or deny the request.

Example: 補助金の申請書を提出した。
（ほじょきん の しんせいしょ を ていしゅつ した。）
I submitted an application for the subsidy.

請求書 / 要求書 / 依頼書 — document forms

These three words all end in 書（しょ）= document/letter, but they represent very different types of paperwork:

Common Mistakes English Speakers Make

Translating every “request” as 要求 (too strong)

This is the most damaging mistake. When English speakers look up “request” in a dictionary, 要求 sometimes appears near the top. But in practice, 要求 is too forceful for everyday requests. Saying 上司にミーティングの設定を要求した sounds like you are filing a complaint or issuing an ultimatum — when all you meant was “I asked my boss to set up a meeting.”

✅ Use 依頼した or お願いした instead for polite, everyday requests.
❌ Do not use 要求した unless you genuinely mean a demand backed by rights or pressure.

Using 要請 for simple business requests

要請 carries the weight of official authority. If you write 同僚にデータの共有を要請した in a workplace email, it sounds extremely formal and slightly alarming — as if you are a government inspector, not a colleague. Use 依頼した or お願いした for requests within your own organization.

Confusing 請求 with 依頼

A learner who wants to say “I requested the vendor to make a proposal” might write ベンダーに提案書を請求した — which actually means “I billed the vendor for a proposal” or “I claimed a proposal from the vendor” as if it were owed under a contract. The correct sentence is ベンダーに提案書の作成を依頼した.

Missing the forceful tone of 要求 in written complaints

In the opposite direction, learners sometimes soften a legitimate complaint by using 依頼 when 要求 is warranted. If you have been wrongly charged and want your money back, writing 返金をお願いします is polite but may not convey enough seriousness. 返金を要求します is firmer and more appropriate in a formal complaint letter.

Overusing お願い in formal business contexts

お願い is wonderful in casual and semi-formal situations, but over-relying on it in formal business writing can sound unsophisticated. When writing to a client, ご依頼いただきありがとうございます sounds more professional than the equivalent with お願い. Learning when to upgrade from お願い to 依頼 is an important step toward natural business Japanese.

Decision Rule: Which Request Word Should You Use?

Use this flowchart whenever you are unsure which word fits your situation.

Is this about money, payment, or a legal/contractual claim?
  YES → 請求（せいきゅう）
       e.g. 請求書を送る, 損害賠償を請求する, 保険を請求する
  NO  ↓

Is the request coming from a government body, institution, or official authority?
  YES → 要請（ようせい）
       e.g. 政府の要請, 緊急要請, 協力を要請する
  NO  ↓

Are you asserting a right, filing a complaint, or applying strong pressure?
  YES → 要求（ようきゅう）
       e.g. 改善を要求する, 返金を要求する, 要求書を送る
  NO  ↓

Are you politely asking someone (colleague, vendor, client) to do a work task?
  YES → 依頼（いらい）— for formal or business contexts
       or お願い（おねがい）— for casual or semi-formal contexts
       e.g. 仕事を依頼する, 資料作成を依頼する, 依頼メールを送る

Is this a wish or suggested improvement, not a firm request?
  → 要望（ようぼう）
       e.g. ユーザーの要望, ご要望を伺う

Is this a formal application to a government or regulatory body?
  → 申請（しんせい）
       e.g. 補助金を申請する, 申請書を提出する

If you are ready to take your business Japanese further, working with a native-speaking tutor is one of the fastest ways to internalize these distinctions. italki connects you with professional Japanese teachers who can review your business emails, correct your nuance mistakes, and give you the kind of feedback that textbooks cannot. Even a few sessions can dramatically sharpen your feel for words like 依頼, 要求, and 請求 in real contexts.

Quick Quiz

Choose the best word from 依頼, 要求, 要請, 請求, or お願い for each blank. Check your answers below.

1. フリーランサーとして仕事を終えたので、クライアントに代金を __________した。
I finished the work as a freelancer, so I __________ the client for payment.

2. 製品に欠陥があったので、メーカーに改善を __________した。
Since the product had a defect, I __________ the manufacturer to make improvements.

3. デザイン会社にパンフレットの制作を __________した。
I __________ a design company to produce the pamphlet.

4. 市は住民に外出を控えるよう __________した。
The city formally __________ residents to refrain from going out.

5. 弁護士を通じて、会社に損害賠償を __________した。
Through a lawyer, I filed a __________ against the company for damages.

6. お客様から商品の改良についてご__________ をいただきました。
We received a __________ from the customer regarding product improvements.
(Hint: This is a soft wish, not a complaint or demand.)

Answers:
1. 請求（せいきゅう）— Billing a client for completed work is exactly what 請求 means.
2. 要求（ようきゅう）— A defective product gives you grounds to demand improvements. 要求 is appropriate here.
3. 依頼（いらい）— Commissioning creative work from a company is a polite, cooperative request — 依頼.
4. 要請（ようせい）— A city formally requesting residents to act is an institutional, official request — 要請.
5. 請求（せいきゅう）— Legal compensation claims use 請求. Note: 要求 could also work informally, but 請求 is the standard legal term.
6. 要望（ようぼう）— A customer’s product improvement wish is softer than a demand — 要望 is the right register.

Which of these four words do you find most confusing? Have you ever received a 請求書 in Japanese, or written a 依頼メール? Share your experience in the comments below — we would love to hear how you are using these words in real life!

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あわせて読みたい

Japanese Shopping and Money Vocabulary: Prices, Sizes, Payment, Receipts, Tax-Free, Staff Phrases... **Target level**: JLPT N5–N4 / Beginner–Intermediate **Topic**: A complete guide to Japanese shopping and money vocabulary for English speakers — covering st...