📌 What is this grammar?

〜をもって is a formal expression used to mean:

• “By means of…”
• “With…”
• “As of…” (when expressing a time)

It’s often used in written, formal, or ceremonial contexts like official statements, business announcements, and legal documents.

📖 Structure

🎨 Meanings and Usage

1️⃣ By means of / With / Using (method, means)

Used to express the method or means used to achieve something.

Example:

• 最新の技術をもって解決する。
  → We will solve it by means of the latest technology.

2️⃣ As of (specific time)

Used to indicate the end or start of a situation at a specific time.

Example:

• 本日をもって閉店いたします。
  → We will close as of today.

📚 Example Sentences

📌 Nuances & Tone

• Extremely formal and written-only
• Common in:
  • Official announcements
  • Company notifications
  • Contracts
  • Ceremonial speeches
• Not used in casual conversations

📝 Comparison with Similar Patterns

Example:

• 笑顔で対応する。→ neutral
• 笑顔をもって対応する。→ formal, ceremonial

✅ Practice Exercise

Translate into Japanese using ～をもって:

1. As of today, I will leave the company.
2. This concludes the event.
3. We will respond with sincerity.
4. We will treat the patient using advanced technology.

Possible Answers:

1. 本日をもって退職いたします。
2. これをもってイベントを終了します。
3. 誠意をもって対応いたします。
4. 最新の技術をもって患者を治療します。

📝 Summary Table

📑 Pro Tip:

You’ll see this in:

• N1 reading passages
• Official company or school announcements
• Government notices
• Legal documents