懇こん書しょ

noun

your kind letter

A formal, respectful term used to refer to a letter received from someone, emphasizing the writer's kindness or sincerity. Common in polite correspondence.

• 先せん日じつはご懇こん書しょを賜たまわり、誠まことにありがとうございます。

  Thank you very much for your kind letter the other day.