Japanese phrase
___までに回答いたします。 ___ ma de ni kai tō i ta shi ma su
Meaning
I will reply by ___.
When to use it
States that a reply will come by a set time. The polite formal tone works well when giving a business update or answering a request.
Example dialogue
いつまでに回答できますか？ i tsu ma de ni kai tō de ki ma su ka
When can you get back to me?
来週までに回答いたします。 rai shū ma de ni kai tō i ta shi ma su
I will reply by next week.