AIで英語ビジネスメールを無料で書く方法【例文・プロンプト集2026】

以下の内容を英語のビジネスメールにしてください。

相手：取引先の担当者（面識あり）
目的：来週の打ち合わせの日程調整
内容：
- 来週月曜〜水曜のどこかで打ち合わせをしたい
- オンラインでも対面でも対応可能
- 議題はQ3の予算計画について

丁寧でプロフェッショナルなトーンでお願いします。

【相手との関係】長年の取引先／初めてのコンタクト／社内の外国籍同僚
【メールのトーン】フォーマル／セミフォーマル／カジュアル
【メールの長さ】短く簡潔に／詳しく丁寧に
【特別な注意点】謝罪が必要、悪いニュースを伝える、催促の必要あり

初めて連絡する海外のサプライヤー（アメリカ企業）へのビジネスメールを作成してください。
- 自己紹介：山田太郎、株式会社〇〇の購買部マネージャー
- 目的：製品カタログと価格表の請求
- 製品カテゴリ：産業用センサー
- 丁寧でプロフェッショナルなトーン

Subject: Inquiry Regarding Product Catalog and Pricing – [Your Company Name]

Dear [Recipient's Name],

My name is Taro Yamada, and I am the Purchasing Manager at [Company Name], a manufacturing company based in Japan. We specialize in [brief description of your company's business].

I am reaching out to express our interest in your industrial sensor products. After reviewing your company's profile, we believe there may be a strong potential for a mutually beneficial business relationship.

Could you please send us your current product catalog and pricing information at your earliest convenience? Additionally, if you have a minimum order quantity or any other requirements for new customers, we would appreciate knowing those details as well.

We look forward to hearing from you and exploring the possibility of working together.

Best regards,
Taro Yamada
Purchasing Manager
[Company Name]
[Phone Number]
[Email Address]

オンライン会議のアポイントを依頼するメールを作成してください。
- 相手：既存取引先（半年ほど付き合いがある）
- 目的：新製品ラインの提案プレゼンをしたい
- 希望日時：来週中（できれば午前中）、30〜45分
- 使用ツール：Zoom
- トーン：丁寧だがフレンドリー

Subject: Meeting Request – Presentation on Our New Product Line

Hi [Name],

I hope this message finds you well! I wanted to reach out to see if we could find a time to connect next week.

I'd love to walk you through our latest product line, which I think could be a great fit for your current needs. The session would take about 30 to 45 minutes, and I'm happy to work around your schedule.

Would any of the following times work for you?
- Monday, [Date]: 10:00–11:00 AM (JST)
- Tuesday, [Date]: 9:30–10:15 AM (JST)
- Wednesday, [Date]: 11:00 AM–12:00 PM (JST)

If none of these work, please feel free to suggest a time that's more convenient. We can connect via Zoom — I'll send the link once we confirm the timing.

Looking forward to chatting!

Best,
[Your Name]

納期遅延を謝罪する英語メールを作成してください。
- 状況：製造トラブルにより、予定の納期より2週間遅れる見込み
- 新しい納期：6月末
- 相手：重要取引先の調達担当者
- トーン：誠実で丁寧、責任を明確に認める
- 代替案として、一部先行納品が可能であれば提案する

Subject: Important Update Regarding Your Order – Revised Delivery Schedule

Dear [Name],

I am writing to sincerely apologize for the delay in fulfilling your recent order (Order #[Number]).

Due to an unexpected issue in our production process, we are unable to meet the originally scheduled delivery date. We now anticipate that your order will be ready for shipment by the end of June — approximately two weeks later than planned.

I want to be transparent: this delay is entirely our responsibility, and I fully understand the inconvenience this may cause for your operations.

To minimize the impact on your business, I would like to propose the following options:

1. **Partial shipment**: We can ship approximately 60% of your order by [earlier date], with the remainder to follow by June 30th.
2. **Full shipment by June 30th**: If you prefer to receive the complete order at once, we will ensure everything is shipped no later than June 30th.

Please let me know which option works better for you. We are also open to discussing any adjustments that may help, including expedited shipping at our expense.

Again, I deeply apologize for this situation and thank you for your patience and continued trust in us. Please do not hesitate to reach out if you have any questions.

Sincerely,
[Your Name]
[Title]
[Company Name]
[Contact Information]

未払いの請求書の支払いを催促するメールを作成してください。
- 状況：支払期限から2週間が過ぎている
- 請求金額：$5,000
- 請求書番号：INV-2026-042
- トーン：丁寧だがはっきりと催促する。関係を壊さないように配慮する

Subject: Friendly Payment Reminder – Invoice #INV-2026-042

Dear [Name],

I hope you are doing well. I am writing to follow up on Invoice #INV-2026-042 for $5,000.00, which was due on [Due Date].

I understand that things can get busy, and this may simply have been overlooked. If the payment has already been sent, please disregard this message and accept my thanks.

If payment has not yet been processed, I would appreciate it if you could arrange it at your earliest convenience. For your reference, I have attached a copy of the original invoice.

Should you have any questions or if there is an issue I can assist with, please do not hesitate to contact me directly.

Thank you for your attention to this matter, and I look forward to your confirmation.

Best regards,
[Your Name]
[Title]
[Company Name]
[Phone / Email]

Subject: Thank You for Your Proposal – Next Steps

Dear [Name],

Thank you for sending over the proposal and detailed quotation. We have had a chance to review everything carefully, and we are impressed with the thoroughness of your approach.

We are very much interested in moving forward and would like to discuss a few points in more detail before finalizing our decision. Specifically, we have some questions regarding [topic 1] and [topic 2].

Would you be available for a brief call later this week to go over these points? Please let me know your availability, and I will do my best to accommodate.

Thank you again for your time and effort. We look forward to the next steps.

Best regards,
[Your Name]

Subject: Weekly Update – [Project Name]

Hi Team,

I hope everyone is having a great week. Here is a quick update on where things stand with [Project Name]:

**Completed this week:**
- [Task 1]
- [Task 2]

**In progress:**
- [Task 3] – On track for completion by [Date]
- [Task 4] – Slight delay; new target is [Date]

**Blockers / Items needing input:**
- [Issue] – Input needed from [Person/Team] by [Date]

**Next week's focus:**
- [Priority 1]
- [Priority 2]

Please feel free to reach out if you have any questions or if there's anything I can support you with.

Have a great weekend, everyone!

Best,
[Your Name]