godan verb (-ru)
to become; to come to be
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
開会式は午前十時より相成ります。
The opening ceremony will be held from 10 a.m.
このたび、結婚式を挙げる運びと相成りました。
We are pleased to announce that we will be holding our wedding ceremony.