相成る (あいなる) Japanese meaning | KotomoraMeanings
1
godan verb (-ru)
to become; to come to be
polite (teineigo)
Formal, polite equivalent of 成る (なる). Used in announcements, official statements, and formal writing. Often appears as 相成ります or 相成りました.
See also: 成る
We are pleased to announce that we will be holding our wedding ceremony.