Use いたす when speaking formally about what you or your organization will do.
The idea
いたす is a humble equivalent of する and a godan verb. It can follow a verbal noun with を, or form expressions such as ご案内いたします. Its polite forms include いたします and いたしました; ことにいたしました expresses a decision.
| Dictionary form | Polite non-past | Polite past | て form |
|---|---|---|---|
| いたす | いたします | いたしました | いたして |
Examples
- 私がご案内いたします。I will show you the way.
- 担当者が後ほどご連絡いたします。The person in charge will contact you later.
- 資料を明日までに用意いたします。I will prepare the materials by tomorrow.
- 先日、予約を変更いたしました。I changed the reservation the other day.
- この件はまだ確認いたしておりません。I have not yet checked this matter.
- 会議の開始を少し遅らせることにいたしました。We have decided to delay the start of the meeting a little.
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Watch out
Do not use いたす to honor a customer’s own action: なさる is an honorific for that person. いたす lowers the speaker’s side, while します is neutral polite speech.
Try it yourself
_。(いたす→ます)
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いたします
いたします is the polite non-past form of いたす; it can refer to a future action.
_。(いたす→て)
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いたして
いたして is the て form of the godan verb いたす; the final す changes to して.
私がご案内_。(いたします/なさいます)
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いたします
いたします fits because the speaker is providing the guidance; なさいます would honor the other person’s action.
Practice round
Answer questions, then rebuild Japanese sentences where available. We keep your score.
_。(いたす→ます)
_。(いたす→て)
私がご案内_。(いたします/なさいます)
Tap the words in the right order.
Tap the words in the right order.
Tap the words in the right order.
Keep your progress
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Tell a customer that you will prepare a document, then change the sentence into the polite past.

