雅兄
が
け
い
Meanings
1
you (honorific, in letters to a male friend)
honorific or respectful (sonkeigo)male term, language, or name
A respectful second-person pronoun used by men in written correspondence, especially letters, to address a male friend. It carries a formal, polite tone and is not used in everyday speech.
Thank you for the letter I received from you the other day.