How would you express the phrasing “Courtesy of [x]” in Japanese?


I’m having a bit of trouble figuring out how to phrase this sort of thing. I’m
thinking of this in the context of “acknowledging that someone has formally
done a service for another”.

Examples might be: some kind of event presented to its guests _courtesy of_
their sponsor, a delivery completed _courtesy of_ a shipping service, a gift
given _courtesy of_ the help of someone else.

Alternatively, yourself providing a gracious service to another
person—“courtesy of yours truly”? I’d like to get a comparison of what to do
versus what _not_ to do when trying to say something like this, if possible.
I’m not sure how you would approach this sort of phrasing politely, versus
politely-but-arrogantly.

I feel like this must be a grammatical construction/keigo thing, but I’m not
sure whether it’s something you’d use sonkeigo or teneigo, etc. for?




You can use [提供](https://jisho.org/word/%E6%8F%90%E4%BE%9B) like this:

  * この写真はAによる提供です。  
This picture is courtesy of A.

  * 無料WiFi提供: A  
Free WiFi courtesy of A

  * 本イベントのライブ配信はAの提供でお送りします。  
Live coverage of the event is courtesy of A.

  * お菓子はAに提供していただきました。  
These snacks are courtesy of A.

