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I work in Company A, and mailing within Company A usually starts with:

> 〇〇さん、
>
> お疲れ様です、〇〇です。

We have a joint dev team with Company B, and mailing to Company B starts with:

> 〇〇さん _or_ 〇〇会社ＸＸ事業担当者様
>
> いつもお世話になっております、〇〇です。 _or_ 〇〇会社の〇〇と申します。

An employee of Company C is on loan to our Company A. Which greeting should I
use when mailing to Company C employee?
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2017-04-03T04:46:18.810
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2020-06-17T08:18:27.500
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word-choice business-japanese
お世話になってます vs お疲れ様です
The company/employee is not yours, it is almost always better to write/print
as

> 〇〇会社ＸＸ事業担当者様
>
> 〇〇会社ＸＸ事業御中 _お名前_ 様 (if you know who)
>
> いつもお世話になっております、 ~~〇〇です~~

Your name should be at the end of the letter.

On the contrary, talk on the phone or in a meeting, introduce first.

> A社の _Your_name_ と申します、いつもお世話になっております
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2017-04-03T07:03:25.623
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The employee of Company C is on loan to your Company A, which means the
employee is currently working with you for Company A, then I think you'd
usually treat them as one of your colleagues. (I believe that's how we
normally treat 派遣/出向社員.) Therefore I suggest you use the former format, which
starts with 「〇〇さん、お疲れ様です、〇〇です。」
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2017-04-03T07:50:01.420
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Both are possible. To put it simply, お疲れさまです looks less respectful but more
friendly, whereas お世話になっております looks more formal and respectful. Which to use
would depend on your character/preference, the custom of your company, and the
actual relationship between you and the person in Company C. Which describes
the person C better, your colleague, or your client?

If you're unsure, it's always safe to get away with お世話になっております.
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2017-04-03T07:57:39.580
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2017-04-03T07:57:39.580
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I will add an answer that I hope will be beneficial.

Both words do not have the same meaning.

お世話になっております

is something you say in place of where you would use “thanks for always taking
care of me, we are indebted to you..ect..”

お疲れ様です

is used to basically say “good job, you worked hard ect..” and is generally a
greeting you use with co-workers when they are leaving.

The main thing to keep in mind with the usages is the term Uchi and Soto. This
means within and outside of. People within your group “uchi” (co-workers) you
will use less formal language and also say お疲れ様です at the end of the day. Those
who may work for a different company that you are doing business with are
“soto” (those outside your group /non-co-workers ect…) you will say
お世話になっております usually when you see them (more likely いつもおせわになっとります).

I have been yelled at a few times for not understanding uchi and soto
properly. Such as talking about a co-worker to someone outside the company and
adding -san when I should have used their name without the honorific as they
are part of my group.
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2019-03-13T05:16:02.177
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