Japanese phrase
ご懸念はもっともです。 go ke nen wa mo tto mo de su
Meaning
Your concern is perfectly reasonable.
When to use it
Recognizes that another person's concern makes sense. The phrase is polite and reassuring, and it is especially common when responding to questions or worries in a professional setting.
Example dialogue
費用が増えないか心配です。 hi yō ga fu e na i ka shin pai de su
I am worried that the cost may increase.
ご懸念はもっともです。 go ke nen wa mo tto mo de su
Your concern is perfectly reasonable.