It means 'to do'. You use it to humbly talk about your own actions. This shows respect to someone above you.
お + Verb [stem] + いたすPrimary
Noun + いたす
It means 'to do'. You use it to humbly talk about your own actions. This shows respect to someone above you.
後ほど、こちらからご連絡いたします。
I will contact you from our side later.
先日は、大変失礼いたしました。
I sincerely apologize for my rudeness the other day.
本日はお時間がないとのことですので、詳しいご説明はいたしません。
Since you don't have time today, I will not give a detailed explanation.
私がお客様を会議室までお連れいたしますので、少々お待ちください。
I will escort the customer to the conference room, so please wait a moment.
本件につきましては、弊社にて対応いたします。
Regarding this matter, our company will handle it.
This form is extra polite. It shows you respect the other person a lot. Think of it like using your very best manners. You use it when you want to be super humble.
It is different from "nasaru." "Nasaru" is used for someone else's actions. You use "itasu" for your own actions. For example, you say "I will do it" with "itasu." You say "the president will do it" with "nasaru." Also, "itasu" means "to do." It does not mean "to say."
Watch out: Do not use いたす for your boss's actions. Use いたす only for your own actions. Or use it for your company's actions when talking to a customer. For your boss's actions, use なさる (nasaru).
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